youth是抽象名词吗

youth 是名词，年轻人

youth作为可数名词的复数形式：youthsyouth：n. 青少年时期（不可数）；早期，初期（不可数）；小伙子（可数）；（总称）青年人（可数）；青春，朝气（不可数）例句：The music evoked memories of her youth.这乐曲勾起了她对青年时代的回忆。Masked youths threw stones and firebombs.戴着面具的年轻人投掷了石头和燃烧弹。The fight was started by a gang of youths.这场打斗是一伙少年挑起来的。

永葆青春泉，长生不老泉(传说在西印度群岛和佛罗里达州，饮此泉可祛病和返老还童)

YOUTH是澳洲歌手Troye Sivan（特洛耶希文）首张主流厂牌专辑Blue Neighbourhood中的第三支正式单曲。单曲于2015年11月12日美国东部时间下午7点在Shazam Top 20中首次正式公布，并于次日凌晨正式在全球正式发行。歌曲由Troye Sivan, Bram Inscore, Brett McLaughlin (Leland), Alex Hope 和 联合创作。111月23日由Scheme Engine指导的单曲官方歌词录音带正式公布。12月9日在JIMMY FOLLON TONIGHT SHOW电视首秀。单曲于2016年1月19日在美国正式派台。2澳洲单曲榜ARIA中达到峰值17的佳绩。歌曲正式MV于2016年2月25日在VEVO首播，24小时内点击率即破一百万。Troye Sivan在单曲宣传视频中阐述了该曲的概念，“这是一首讲述的充满童趣天真的童年和迷失自己的歌曲，也是关于抛弃一切、逃避、犯错以及爱的太辛苦的释怀。”

youth：不可数名词义项：青少年时期,青春活力朝气血气；常用单数的义项：青年人（总称）；可数名词义项：青年男子,小伙子（一般指20以下男青年）例如：when still a youth, he had to make a living by himself.因此,一个青年是可以用a youth 来表达的.

youth用作青年是可数名词的单数形式 可以用a youth，用作青春是不可数名词

YOUTH--- Samuel UllmanYouth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.　　Youth means a temperamental predominance of courage over timidity, of the appetite for adventure over the love of ease. This often exists in a man of sixty more than a boy of twenty. Nobody grows old merely by a number of years. We grow old by deserting our ideals.　　Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear, self-distrust bows the heart and turns the spirit back to dust.　　Whether sixty or sixteen, there is in every human being"s heart the lure of wonders, the unfailing child-like appetite of what"s next, and the joy of the game of living. In the center of your heart and my heart there is a wireless station; so long as it receives messages of beauty, hope, cheer, courage and power from men and from the Infinite, so long are you young.　　When the aerials are down, and your spirit is covered with snows of cynicism and the ice of pessimism, then you"ve grown old, even at twenty, but as long as your aerials are up, to catch the waves of optimism, there is hope you may die young at eighty.

youth在牛津大词典中的解释如下：1 [uncountable] the time of life when a person is young, especially the time before a child becomes an adult.He had been a talented musician in his youth.She regrets that she spent her youth travelling and not studying.2 [uncountable] the quality or state of being youngShe brings to the job a rare combination of youth and experience.His youth gives him an advantage over the other runners.3 [countable] (often disapproving) a young manThe fight was started by a gang of youths.4 (also the youth) [plural] young people considered as a groupthe nation"s youththe youth of todayyouth cultureyouth unemployment

于炀之所以会叫Youth，是因为这是他的英文名，而且也是他的游戏ID名。Youth的意思是青春的、青年，于炀虽然性格比较冷冷的，但是他正值青年时期，所以这个英文名和他十分相配。于炀是大家十分熟悉的一位原耽小说中的男主角，他是游戏高手，也是一位职业的电竞选手。人物形象长相帅气，擅长突击位，祁醉退役后担任HOG战队队长、指挥一职。曾因家庭原因患焦虑症，抵抗与人接触。曾因为此原因和祁醉分手，后加入HOG战队，在祁醉的帮助下渐渐好转，内心坚毅。绝不放弃任何希望。后与祁醉复合。

谢谢

都可以指年轻人theyoung这里的young是形容词，这是定冠词用法中的一种，the加形容词表示一类人.指年轻人.相当于集合名词，不能指一个青年而是一群青年.youthn.年轻;青年，小伙子;本身就是名词theyouth也可指年轻人.一般都是与老年人对立使用的.强调年轻,岁数不大.

散文。根据youth一书内容中的信息，youth被定义为抒情类的散文，youth是散文文体。《youth》是美国作家塞缪尔·厄尔曼创作的一篇散文。

《青春》原文：　　YOUTH [1]　　Samuel Ullman　　Youth is not a time of life; it is a state of mind; it is not a matter of　　rosy cheeks, red lips and supple knees; it is a matter of the will, a　　quality of the imagination, a vigor of the emotions; it is the freshness of　　the deep springs of life.　　Youth means a temperamental predominance of courage over timidity, of the　　appetite for adventure over the love of ease. This often exists in a man of　　60 more than a boy of 20. Nobody grows old merely by a number of years. We　　grow old by deserting our ideals.　　Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul.　　Worry, fear, self-distrust bows the heart and turns the spirit back to dust.　　Whether 60 or 16, there is in every human being"s heart the lure of wonder,　　the unfailing child-like appetite of what"s next and the joy of the game of　　living. In the center of your heart and my heart there is a wireless　　station: so long as it receives messages of beauty, hope, cheer, courage and　　power from men and from the Infinite, so long are you young.　　When the aerials are down, and your spirit is covered with snows of cynicism　　and the ice of pessimism, then you are grown old, even at 20, but as long as　　your aerials are up, to catch waves of optimism, there is hope you may die　　young at 80.　　《 青春》中文译文　　青春　　——塞缪尔．厄尔曼　　王佐良译　　青春不是年华，而是心境；青春不是桃面、丹唇、柔膝，而是深沉的意志，恢宏的想象，炙热的情感；青春是生命的深泉在涌流。　　青春气贯长虹，勇锐盖过怯弱，进取压倒苟安。如此锐气，二十后生而有之，六旬男子则更多见。年岁有加，并非垂老；理想丢弃，方堕暮年。　　岁月悠悠，衰微只及肌肤；热忱抛却，颓废必至灵魂。忧烦，惶恐，丧失自信，定使心灵扭曲，意气如灰。　　无论年届花甲，拟或二八芳龄，心中皆有生命之欢乐，奇迹之诱惑，孩童般天真久盛不衰。人人心中皆有一台天 线，只要你从天上人间接受美好、希望、欢乐、勇气和力量的信号，你就青春永驻，风华常存。　　一旦天线倒塌，锐气便被冰雪覆盖，玩世不恭、自暴自弃油然而生，即使年方二十，实已垂垂老矣；然则只要树起天线，捕捉乐观信号，你就有望在八十高龄告别尘寰时仍觉年轻。　　第二种版本　　青春不是指生命的一段时间，而是指一种精神状态；它并不是指红润的面颊、透红的嘴唇和灵便的腿脚，而是指坚强的意志、丰富的`想象和强烈的感情，它是指生命的源头活水的清新之感。　　青春意味着在气质上勇敢多于怯懦，冒险进取多于舒适苟安。这在60岁的老年人中往往比在20岁的青年人中更为常见。人之变老不仅由于年岁的增长，我们之变老常常是因为放弃了对理想的追求。　　年岁也许会使皮肤增添皱纹，可是一旦丧失热忱，灵魂上的皱纹就会随即出现。忧虑、恐惧和缺乏信心会使人心灰意冷，意志消沉。　　无论是60岁，还是16岁，新奇事物对每个人都有吸引力；只要童心未泯，就会对未来有好奇心和享受人生的乐趣。在你的心中和我的心中都有一座无线电台：只要它总在接收人类和上帝发出的美、希望、鼓励、勇气和力量的信息，你就会永远不老。　　假如你将天线收起，使你的心灵蒙上玩世不恭的霜雪和悲观厌世的冰层，那么即使你年方20，你也老气横秋；然而只要你将天线竖起，去接收乐观主义的电波，那么你就有希望即使活到80岁死去，也仍然是年轻的。　　第三种版本　　人生匆匆，青春不是易逝的一段。青春应是一种永恒的心态。满脸红光，嘴唇红润，腿脚灵活，这些并不是青春的全部。真正的青春啊，它是一种坚强的意志，是一种想像力的高品位，是感情的充沛饱满，是生命之泉的清澈常新。　　青春意味着勇敢战胜怯懦，青春意味着进取战胜安逸。年月的轮回就一定导致衰老吗？要知道呵，老态龙钟是因为放弃了理想的追求。　　无情的岁月的流逝，留下了深深的皱纹，而热忱的丧失，会在灵魂深处打下烙印。焦虑、恐惧、自卑，终会使心情沮丧，意志消亡。　　60岁也罢，16岁也罢，每个人的心田都应保持着不泯的童心，去探索新鲜的事物，去追求人生的乐趣。我们的心中都应有座无线电台，只要不断地接受来自人类和上帝的美感、希望、勇气与力量，我们就会永葆青春。倘若你收起天线，使自己的心灵蒙上玩世不恭的霜雪和悲观厌世的冰凌，即使你年方20，你已垂垂老矣；倘若你已经80高龄，临于辞世，若竖立天线去收听乐观进取的电波，你仍会青春焕发。　　第四种版本　　黄志坚 译　　青春，并非年轻岁月，而是一种心态；青春的特征，并非粉颊、朱唇、柔肢，而是毅力、激情、创意；青春是生命涌泉的清澈、激扬。　　青春，是指超越怯懦、勇气如虹，不图安逸、敢闯敢试。毅力若此，花甲多胜弱冠。年岁递增，非必老化；背弃理想，方陷残年。　　岁月留痕，只及肌肤；激情不再，皱起心灵。忧惧自卑，终致身心佝偻、精神萎靡。　　无论年少或年长，当怀好奇的诱导，像孩子般总渴求着：接下来的进展及驰骋人生的欢乐。　　人人皆有心灵的感官，只要感受源源来自人间与穹苍的启发，感应有关美好、希望、激情、勇毅和能力的信息，你就会朝气勃勃、青春无限。

youth单复数同形。根据查询相关公开信息显示，youth单数和复数都是一样，是youth，常用单数的义项表示青年人（总称）。

　　赫尔岑说过，小孩儿时候，再加上刚刚进入青春时期的两三年是生活中最充足的最优美的.最属于我们的部分;它不知不觉地决定整个未来。 　　Youth is not a time of life; it is a state of mind. 　　青春不是年华，而是心境; 　　It is not a matter of rosy cheeks, red lips and supple knees. 　　青春不是桃面、丹唇、柔膝， 　　It is a matter of the will, a quality of the imagination, vigor of the emotions; 　　而是深沉的意志、宏伟的想象、炽热的感情; 　　It is the freshness of the deep spring of life. 　　青春是生命的深泉在涌流。 　　Youth means a temperamental predominance of courage over timidity, 　　青春气贯长虹，勇锐盖过怯弱， 　　of the appetite for adventure over the love of ease. 　　进去压倒苟安，如此锐气， 　　This often exits in a man of 60, more than a boy of 20. 　　二十后生有之，六旬男子则更多见。 　　nobody grows merely by the number of years;we grow old by deserting our ideas. 　　年年有加，并非垂老;理想丢弃，方堕暮年。 　　Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. 　　岁月悠悠，衰微只及肌肤;热忱抛却，颓唐必至灵魂。 　　Worry, fear, self-distrust1 bows the heart and turns the spirit back to dust. 　　烦忧、惶恐、丧失自信，定使心灵扭曲，意气如灰。 　　Whether 60 or 16, there is in every human being"s heart the lure of wonders, 　　无论年届花甲，抑或二八芳龄，心中皆有生命之欢乐，奇迹之诱惑， 　　the unfailing childlike appetite of what"s next and the joy of the game of living. 　　孩童般天真久盛不衰。 　　In the center of your heart and my heart there is a wireless station; 　　人人心中皆有一台天线， 　　so long as it receives messages of beauty, hope, cheer, courage and power from men and from infinite, 　　只要你从天上人间接受美好、希望、欢乐、勇气和力量的信号， 　　so long as you are young. 　　你就青春永驻，风华常存。 　　When the aerials are down, and your spirit is covered with the snows of cynicism and the ice of pessimism, 　　一旦天线倒塌，锐气被冰雪覆盖，玩世不恭、自暴自弃油然而生， 　　then you"ve grown old, even at 20, but as long as your aerials are up, 　　几十年方二十，实已垂老矣; 　　to catch waves of optimism, there"s hope you may die young at 80. 　　然则只要竖起天线，捕捉乐观的信号，你就有望在八十高龄告别尘寰时仍觉得年轻。

In his youth, he had shown great promise.他在青少年时代就显得很有出息。He mused over memories of his youth.他重温青年时期的往事。Youth glided past without our awareness.青春在我们不知不觉中逝去。I can"t bear young people casting away their youth.我无法忍受年轻人虚掷青春。The youth of the country are being ignored by politicians.这个国家的青年没有受到政治家的重视。His brother is a member of a youth fellowship.他哥哥是青年联谊会的会员。

青年时期 青年时期不是生命时间; 这是心境; 这不是玫瑰色面颊、红色嘴唇和柔软膝盖事情; 这是意愿事情, 想像力, 情感的强健的质量; 这是生活的深刻的春天的生气勃勃。 青年时期意味勇气一个气质的优势在胆怯, 胃口为冒险在舒适爱。这经常存在在一个人60 更比男孩20 。没人仅仅增长老在一定数量的岁月以前。我们增长老由离开我们的理想。 几年也许起皱纹皮肤, 但放弃热情皱痕灵魂。忧虑, 恐惧, 自已怀疑弓心脏和轮精神回到尘土。 是否60 或16, 那里是在每人的心脏奇迹诱剂, unfailing 胃口为什么是下和比赛的喜悦居住。在您的心脏和我的心脏的中心, 有一个无线驻地; 只要它收到秀丽、希望、勇气和力量消息从人和从无限, 只要您是年轻。 当您的天线是下来, 并且您的精神用愤世嫉俗雪报道和悲观冰, 那么您增长老, 在20; 但只要您的天线是, 捉住乐观波浪, 有您可以死年轻人在80 的希望。

n. youth青春 [qīng chūn]youth; youthfulness:give one"s youth to the motherland;把青春献给祖国full of youth and vigour;充满着青春的活力regain one"s revolutionary vigour;焕发了革命青春keep one"s spirit young;永葆青春waste one"s springtime;虚度青春She keeps her youth well.她善于保养她的青春。

歌曲名:Youth歌手:Thumb专辑:3In my life, been all the placesThat I dreamed of since I was a kidBury the past, I"m getting on withThings I never thought I"d get throughSo now I knowI don"t know anythingExcept I notice thatYou"re still hereI don"t want anythingWell that"s a lie becauseI want you here with meI made mistakes, I"ve done some thingsThat I just wish I could go back and changeBut now I"m here, and now I know that ICan learn from those things that I"ve doneSo now I knowI don"t know anythingExcept I notice thatYou"re still hereI don"t want anythingWell that"s a lie becauseI want you here with meDon"t want is backI like who I"ve becomeI"m right on trackI"m feeling half as youngAs I did when I was a kidYouthGoldfingerOpen Your EyesIn my life, been all the placesThat I dreamed of since I was a kidI don"t know anythingExcept I notice thatYou"re still hereI don"t want anythingWell that"s a lie becauseI want you here with meSo now I knowhttp://music.baidu.com/song/2789212

young. 形容词. 意思是年轻的,年纪小的,没有经验的,尚早的,初期的. 前面加the.就变成名词.the young.泛指年轻人. youngster 名词. 年幼者,年轻人,小伙子. 例:Bill is a lively youngster.比尔是个有活力的小伙子 youth 名词, 指青春,青年时代. 加the.变成the youth.意为青年们.

teenage是形容词,十几岁的（13-19岁）,青少年的，特指青少年。youth是对青年和青年人的统称。kids只是指小孩,年轻人。

Youth Youth is a lively topic, youth is a mature turning. We have been or are embrace the youth, we will lose our youth. Youth is like a gust of wind blowing, leaving only the dusty back. I want to stay young, however, time is merciless. I do think about the chastity words to record the regretless youth. Some people say that youth is a scrap of paper, of no use. Every attempt nothing and acplish nothing, only know to eat, drink, play, music, do not know how to study hard, do not know how parents bitterness, do not understand the meaning of life. Also some people, although they are unknown to the public, but they cherish their youth, cherish their own every second. They are studying hard, hard work. Youth is a song, sing the life the most memorable fragment; youth is a painting, draw the outline of the most wonderful scene; youth is a poem, to praise the most beautiful moment in life; youth is the only way which must be passed to each of us in our life, it plays a significant role. As a new era of college students, should cherish the youth, to seize every minute to learn. We must hold to our youth, do not waste one"s life. On the road of growing up, do every thing, each reading a good book, learn every bit of knowledge. We should not idle about all day, abandoned their studies. We want to make sure that the goal of life for themselves, to pursue the ideal of life. This is the youth: full power, full of expectations, voluntary, full of knowledge and the struggle of ambition. Youth, revealed a deep a quality suggestive of poetry or painting; youth, emitting a faint fragrance lovingly. The pace of youth will not stop because of difficulty, the melody of youth is not obstructed by wind and rain and. Youth is the sun, is a sign of confidence; let us raise the youth sailing, let youth where flying, let youth in here! 　　pital are in critical 　　 已发送，请查收。

youthyouthful

青春乐园 青春失乐园Paradise lost youthyouth 　Paradise　lost

名称：YOUTH，（可译为“青年尤斯”），意为年轻、青年一代。YOUTH品牌标志：双翅膀伴着YOUTH字样，表示青年一点激情的飞翔。logo整体时尚、富有活力。YOUTH品牌理念：PlayforPassion.YOUTH品牌内涵：青年人是富有激情的，有激情就需要散发出来，提升自我，激励自我。Passion译为激情，而Play译为玩乐，也可译为弹奏，双重含义表示出了YOUTH品牌的理念：在弹奏中挥洒激情，在玩乐中放飞理想。YOUTH品牌目标：为所有年轻人、青年一代，提供最适合，最具性价比的入门吉他，时尚而不失优雅，价格适中而不失品质。成为年轻一代的专属吉他品牌。 YOUTH作为荣御乐器的民谣吉他品牌系列，隶属于国际知名丽声吉他品牌ROYALL公司，总部座落在美丽的黄埔江畔，上海。作为国内手工吉他的代表品牌之一，其品质和高性价比越来越受到国内外广大吉他爱好者们的关注和推崇。YOUTH吉他，其设计来自于ROYALL总部的中美顶级制琴师们，设计理念主要为了满足广大年轻的入门爱好者。作为一款属于年轻人的品牌系列，YOUTH不断追求质感、优雅和时尚。其产品不仅沿袭了ROYALL的一贯高端和高品质，也同样注重其性价比，让更多的年轻吉他爱好者有了接触质感手工吉他的机会。YOUTH人的信念：为年轻的吉他爱好者打造每一把优质的木吉他！YOUTH人的核心价值：打造品质、时尚、年轻、优雅YOUTH人的愿望：让更多的年轻人通过YOUTH了解吉他，热爱音乐，享受生活。 YOUTH的五大优势：1.时尚不失优雅，年轻时代的最佳玩伴2.手感舒适、流畅，完全适合年轻初学者3.材质优秀、耐用，陪伴度过漫漫时光4.音质突出、秀丽，香草般体验5.高性价比的手工琴典范 YOUTH吉他诞生于2011年。由ROYALL创始人Mawyer先生和世界一流琴师MichaelMesser,RobinClark等一同设计并投入手工生产。ROYALL总部现位于中国上海市，这里有世界一流的手工琴师和先进的吉他制造工艺，并且，ROYALL有着科学的企业管理和人本理念。在这样一个国际顶端吉他企业的理念指导下，YOUTH品牌应运而生。作为世界五大丽声吉他制造公司之一的ROYALL，其本身最大的特点就是全手工制作。在讲究生产效率的工业社会，这样的经营理念早已被追逐效益的品牌所遗弃。但Mawyer先生一直以来都认为做吉他是一门艺术，因此他宁可选择放弃工业化量产，也要做出一把把如同手工艺术品一样的吉他！同样，作为ROYALL旗下的民谣吉他品牌YOUTH，在保证高品质手工工艺的同时，也保证了完美的款型和手感，更重要的是，相对于价格不菲的ROYALL丽声吉他来说，YOUTH的价格定位更能满足广大吉他初级爱好者们。在工厂，每个流程都离不开手工，人的因素至关重要。据Mawyer先生介绍，几位高级琴师都是从ROYALL建厂开始便在工厂工作，工龄都在十年以上。同时，工厂也注重陪养工人们对吉他的喜爱，让很多技师都能深入了解吉他的特性，不管是蓝调吉他还是民谣木吉他，以改善自己产品的不足。YOUTH民谣吉他系列采用了英国传统的手工制琴工艺，针对工厂特点对工艺进行了改良，使其产品更符合年轻人的使用习惯。年轻态的YOUTH吉他有着更为优雅时尚的款型，缺角木吉他一律采用威尼斯缺角，产品多采用天然原木色，完美展现了木材的质感和高端。除此之外，YOUTH还沿用了与Martin品牌相同的琴头，增加前置背订等设计，电箱款一律搭载Fishman和ARTECPiezo。YOUTH工厂生产的每支吉他，都选用的是上好的木材，使用不断创新的技术，配合人性化的细节来打造。云杉，玫瑰木，枫木，珍珠彩贝、牛骨、乌木等材料，通过技师们运用各种“原始工具”进行雕琢，每一支吉他，都是蕴含着追求原木共鸣的音色与质感和追求高品质完美意境的，是最有艺术气质的产品，每一支YOUTH吉他都是独一无二的。时至今日，虽然YOUTH是定位为年轻人打造的初级民谣系列。但YOUTH吉他在国内已经受到了众多年轻乐迷们的一致追捧。众多的学生和年轻白领们都对YOUTH充满了欣喜和期待。2013年，YOUTH又做为ROYALL旗下品牌正式进军欧美市场。高性价比一直是YOUTH吉他不断成功的关键。经过不断努力的改良和完善，在专业吉他领域，YOUTH作为一颗冉冉升起的明日之星，被誉为国内性价比极高的的乐器产品代表之一。 木料是音色灵魂之所在，所以了解各种木料的物理属性是致关重要的。寻找好的木料来成就吉他的最好音色，作为ROYALL旗下的初级木吉他系列，YOUTH也尽可能地选择了木头同时具有视觉上的美观以及听觉上的悦耳，你将可以发现YOUTH吉他将可带给你最好的款型和音色享受。1.Sitkaspruce清亮的音色，极广域的音色动态表现，适合给节奏性强烈的曲风.2.TropicalAmericanMahogany清亮的音色，独特的音色平衡反应让极细微的拨弦都能清楚地呈现。3.AfricanMahogany音色温暖中频饱满，音色平衡反应与TropicalAmericanMahogany类似。4.EngelmannSpruce比Sitka较为轻的木料，提供温和的泛音共鸣。5.Sapele比桃花芯木更为密实与坚硬，提供清脆明亮的音色。6.IndianRosewood饱满的低频响应，共鸣与延音表现良好。形容木料共鸣的音色宛如解释香草冰淇淋的味道，是说出音色它本身大概的感觉，或是你回到对木料音色最主观的认知。所以当YOUTH吉他完成时，决定了琴身型态后，木料是影响音色的最后一个步骤，如果你认同我们对于木料音色的形容，那就用你的耳朵来当裁判吧! YOUTH所有三系列分为5系列，6系列，7系列。以材质进行划分。5系列YOUTH5系列提供较为经济价位的吉他来开启一段木吉他弹奏生涯，让大家体验YOUTH吉他的魅力。5系列为刺楸木配置，颜色为刺楸木原木，漆面为哑光开放漆，尺寸分为40和41寸，款型分为A型和D型。目前有三款产品:AC599,AC561,AC561R。6系列YOUTH6系列背板与边板采用Sapele,面板采用SitkaSpruce，指板与琴桥则为IndianRosewood，6系列给予吉他玩家更优质的音色体验。颜色分为原木SitkaSpruce、樱桃色SitkaSpruce和日落色SitkaSpruce，尺寸分为40和41寸，款型分为A型、D型和OM型。目前有四款产品，分为AC601、AC661、AC661R、AC651R-N。7系列YOUTH7系列具有简单典雅的外型，7系列面板、背板、边板都为Sapele，这是一款十分优雅的吉他，款型尤其适合女生，给你最经典的木料音色。亮眼的外型,均衡适中的共鸣，非常适合于舞台上演出弹奏。7系列颜色为Sapele，尺寸分为40寸和41寸，款型为A型和D型。目前有三款分为AC751、AC761、AC761R。YOUTH全系列将每年增加1-2款新品，同时去除不顺应潮流的产品。 著名民谣音乐人白羽全球杰出青年Mawyer毛诗人、旅行家小司

新概念英语课文Youth内容讲解 　　导语：青年总是朝气勃发充满生气的，下面是一篇讨论青年的英语课文，欢迎阅读。 　　Youth 　　青年 　　First listen and then answer the following question: 　　听录音，然后回答以下问题。 　　How does the writer like to treat young people? 　　People are always talking about "the problem of youth". If there is one -- which I take leave to doubt -- then it is older people who create it, not the young themselves. Let us get down to fundamentals and agree that the young are after all human beings -- people just like their elders. There is only one difference between an old man and a young one: the young man has a glorious future before him and the old one has a splendid future behind him: and maybe that is where the rub is. 　　When I was a teenager, I felt that I was just young and uncertain -- that I was a new boy in a huge school, and I would have been very pleased to be regarded as something so interesting as a problem. For one thing, being a problem gives you a certain identity, and that is one of the things the young are busily engaged in seeking. 　　I find young people exciting. They have an air of freedom, and they have not a dreary commitment to mean ambitions or love of comfort. They are not anxious social climbers, and they have no devotion to material things. All this seems to me to link them with life, and the origins of things. It"s as if they were, in some sense, cosmic beings in violent and lovely contrast with us suburban creatures. All that is in my mind when I meet a young person. He may be conceited, ill-mannered, presumptuous or fatuous, but I do not turn for protection to dreary cliches about respect for elders -- as if mere age were a reason for respect. I accept that we are equals, and I will argue with him, as an equal, if I think he is wrong.FIELDEN HUGHES from Out of the Air, The Listener 　　New words and expression 生词与短语 　　leave 　　n. 允许 　　fundamentals 　　n. 基本原则 　　glorious 　　adj. 光辉灿烂的 　　splendid 　　adj. 灿烂的 　　rub 　　n. 难题 　　identity 　　n. 身份 　　dreary 　　adj. 沉郁的 　　commitment 　　n. 信奉 　　mean 　　adj. 吝啬，小气 　　social climber 　　追求更高社会地位的.，向上爬的人 　　devotion 　　n. 热爱 　　cosmic 　　adj. 宇宙的 　　suburban 　　adj. 见识不广的，偏狭的 　　conceited 　　adj. 自高自大的 　　presumptuous 　　adj. 自以为是的，放肆的 　　fatuous 　　adj. 愚蠢的 　　cliche 　　n. 陈词滥调 　　本文参考译文 　　人们总是在谈论“青年问题”。如果这个问题存在的话 -- 请允许我对此持怀疑态度 -- 那么，这个问题是由老年人而不是青年人造成的。让我们来认真研究一些基本事实：承认青年人和他们的长辈一样也是人。老年人和青年人只有一个区别：青年人有光辉灿烂的前景，而老年人的辉煌已成为过去。 问题的症结恐怕就在这里。 我十几岁时，总感到自己年轻，有些事拿不准 -- 我是一所大学里的一名新生，如果我当时真的被看成像一个问题那样有趣，我会感到很得意的。因为这至少使我得到了某种承认，这正是年轻人所热衷追求的。 　　我觉得年轻人令人振奋，无拘无束。他们既不追逐卑鄙的名利，也不贪图生活的舒适。他们不热衷于向上爬，也不一味追求物质享受。在我看来，所有这些使他们与生命和万物之源联系在了一起。从某种意义上讲，他们似乎是宇宙人，同我们这些凡夫俗子形成了强烈而鲜明的对照。每逢我遇到年轻人，脑子里就想到这些年轻人也许狂妄自负，举止无理，傲慢放肆，愚昧无知，但我不会用应当尊重长者这一套陈词滥调来为我自己辨护，似乎年长就是受人尊敬的理由。我认为我和他们是平等的。如果我认为他们错了，我就以平等的身份和他们争个明白。 ;

youthfulness

the youth

youthfulness

歌曲名:Youth歌手:马蒂斯亚胡专辑:No Place To BeThieves And Villains - YouthSoon he"ll have to start answering meand if its words that bring us peacetil I found a note…alone“That I don"t think I could help you write.A word is worth the one who writes the song….who rides along.”Instead of screaming the youth is callingand you all hate the wordsI"m thinking that you should join inand we"ll all sing a verse in honor of youthI"m sick of all the talk and tauntssaying our words don"t reach the heartwell this hearts anew to choose“Now a wind has come and swept the placeIts drained our cups and changed the way we write…the way we hide”I"m still confused how gentleman callers think they owe youwhen you just get smallerI"ll teach em all if you can say “Father,we"re on our own with no mean to bother”http://music.baidu.com/song/20814240

以上两位的解释都可以

1． Chen YP, Shen YY, Guo X, Zhang CS, Yang WJ, Ma ML, Liu S, Zhang MB, Wen LP#. Transdermal protein delivery by a co-administered peptide identified via phage display. Nature Biotechnology 24：455-50 (2006)2． Chen YP, Shen YY, Guo X., Zhang CS, Yang WJ, Ma ML, Liu S, Wen LP. (2006) Transdermal protein delivery by a co-adminstered peptide identified via phage display. Filed for US provisional patent on Nov. 30, 2005 (EL 973738349 US)3． Wen LP, Chen YP, Shen YY, Guo X. (2006) Transdermal enhancers and method of use. Filed for US provisional patent on Nov. 15, 2005 (EL 973738321 US)4． 温龙平，陈勇平，沈媛媛，郭欣。（2006）透皮给药增强剂及其使用方法。中国专利号CN 06-1002 3887.15． Man N, Cheng YY, Xu TW, Ding Y, Wang XM, Li ZW, Chen ZC, Huang GY, Shi YY and Wen LP#. Dendrimers as potential drug carriers. Part II. Prolonged delivery of ketoprofen by in vitro and in vivo studies. European Journal of Medicinal Chemistry Online Publication #: doi:10.1016/j.ejmech.2006.01.001 (2006)6． Chen Y, Yang LS, Feng C, Wen LP#. Nano neodymium oxide induces massive vacuolization and autophagic cell desth in non-small cell lung cancer NCI-H460 cells. Biochemical and Biophysical Research Communications 337: 52-60 (2005)7． 温龙平，高理钱，孟 丹。（2005）α-促黑激素的环状类似肽及其应用。中国专利号CN 0510083984.58． 温龙平，唐飞，连昆。 （2003）集成微流体和微阵列探针的微芯片。 中国专利号 ZL 02 2 47727.69． Wen LP, Madani K, Martin GA, Rosen GD. Proteolytic cleavage of ras GTPase-activating protein during apoptosis. Cell Death Differ 5(9):729-34 (1998)10． Wen LP, Madani K, Fahrni JA, Duncan SR, Rosen GD. Dexamethasone inhibits lung epithelial cell apoptosis induced by IFN-gamma and Fas. Am J Physiol 273:L921-9 (1997)11． Wen LP, Fahrni JA, Troie S, Guan JL, Orth K, Rosen GD. Cleavage of focal adhesion kinase by caspases during apoptosis. J Biol Chem 272(41):26056-61 (1997)12． Wen LP, Fahrni JA, Matsui S, Rosen GD. Airway epithelial cells produce stem cell factor. Biochim Biophys Acta 1314(3):183-6 (1996)13． Wen LP, Koeiman N, Whitlock JP Jr. Dioxin-inducible, Ah receptor-dependent transcription in vitro. Proc Natl Acad Sci USA 87(21):8545-9 (1990)14． Wen LP, Ruettinger RT, Fulco AJ. Requirement for a 1-kilobase 5"-flanking sequence for barbiturate-inducible expression of the cytochrome P-450BM-3 gene in Bacillus megaterium. J Biol Chem 264(19):10996-1003 (1989)15． Wen LP, Fulco AJ. Cloning of the gene encoding a catalytically self-sufficient cytochrome P-450 fatty acid monooxygenase induced by barbiturates in Bacillus megaterium and its functional expression and regulation in heterologous (Escherichia coli) and homologous (Bacillus megaterium) hosts. J Biol Chem. 262(14):6676-82 (1987)

郑秀丽去买了3瓶硫酸，准备泼到兄嫂的两个儿子脸上，却也误伤了同行的孩子，连伤七个孩子最后判了死缓！

很大区别，双方是平行关系，NBL是全国男子篮球联赛，CBA是中国男子职业篮球联赛，关注度不一样，CBA关注度更高。CBA不实行升降级制，而NBL实行A、B两组升降级。

L-色氨酸是人和动物生命活动中八种必须氨基酸之一，对人和动物的生长发育、新陈代谢起着重要作用。L-色氨酸的生产方法有多种，其中以发酵法最具发展前途。因此，如何采取有效措施提高发酵液中L-色氨酸的产率，并将其精制出来是目前急待解决的问题。本文通过对种树脂的筛选、吸附和洗脱条件的优化，以及对脱色、结晶方法的研究与摸索，最终确定强酸型阳离子树脂HZ-001在pH=3，3倍床体积流速，温度室温，对色氨酸有最大的吸附作用；将发酵液离心去沉淀并用活性炭脱色后通过HZ-001强酸型阳离子交换树脂柱，再用2mol/L的氨水6倍床体积流速在室温下进行洗脱，收集洗脱液，60℃浓缩为过饱和状态后加入30%无水乙醇，4℃下100rpm摇起晶20h，过滤搜集结晶并真空干燥得白色粉片状L-色氨酸晶体。总体收率为72.36%，纯度达97.4%。

一、级别不同1、CBA级别：中国男子篮球职业联赛，是由中国篮球协会所主办的跨年度主客场制篮球联赛，中国最高等级的篮球联赛。2、NBL级别：由职业篮球俱乐部组成的全国性篮球联赛，隶属于中国篮球协会三大联赛之一，也是国家体育总局第一个“管办分离”落地的国家顶级联赛。二、创办时间不同1、CBA创办时间：创办时间是1995年。2、NBL创办时间：创办时间是1996年。扩展资料：CBA在1995-1996赛季由555香烟取得联赛的冠名权，从1996-1997赛季到2000-2001赛季的希尔顿中国男篮甲级联赛获得联赛冠军。之后，摩托罗拉和联通新时空分别夺得联赛冠军。该联盟于2005年正式更名为中国男子篮球职业联赛。CBA球队数量共计20支。CBA自每年的10月或11月开始至次年的4月左右结束，截至2008-2019赛季，已有7支球队获得冠军。广东队第九次夺冠，八一队第八次夺冠，北京队第三次夺冠，上海队、四川队、新疆队和辽宁队各一次夺冠。参考资料来源：百度百科-全国男子篮球联赛参考资料来源：百度百科-中国男子篮球职业联赛

《盲山》结局是白雪梅生下一个孩子，最后被警察救回来，白雪梅只能看着孩子泪流满面的离去。据传还有另外一个结局是，“丈夫”的母亲以死要挟，村民暴动，以至于警察不得不停车离开，让女孩的父亲留下，虽然警察说一定会回来营救，但第二天当女孩的父亲要带女孩离开时被男人们抓住，并遭到殴打，女孩情急之下拿刀把男人砍了。警察走掉了，留下了白雪梅和她的老父亲。与“女婿”黄德贵争执期间，老父亲被打倒在地，情急之下，白雪梅拿起了菜刀，手起刀落，画面定格。电影评价《盲山》是一部为人震惊的力作，电影透过一个女大学生被拐卖到山村的写实，营造出令人绝望的压抑。将一个沉重的“盲”人世界真实的呈现在观众面前，愚昧的无知成为了电影对人性丑恶所诠释的盲点，而以此中电影里每一个人的心盲都构成了其沉重的奠基。而电影最终两种不同版本的结局，一个结局虽然稍显潦草，却仍代表着“盲”后的希望，而另一个结局则代表着电影艺术对“盲”最为有力的着点。

过去普遍认为，VRS是蛛网膜下腔伴随进入脑实质穿通血管的延伸，与蛛网膜下腔是相通。目前认为，VRS是蛛网膜的软脑膜随着穿通动脉和流出静脉进出脑实质的延续，直至毛细血管水平。VRS是与软脑膜下腔接续的。电镜与示踪剂的研究证明，大脑半球的VRS与蛛网膜下腔并不直接相通。在脑内、软脑膜下腔和蛛网膜下腔的小动脉和微小动脉周围包绕着由软脑膜细胞形成的血管周围鞘，脑内动脉的血管周围间隙与蛛网膜动脉的血管周围间隙是直接相连的。在大脑半球，VRS是由单层软膜构成，在纹状体动脉周围是由双层软膜构成。这些VRS常常很小，直径约1-2mm。VRS充满组织间液，不是脑脊液。VRS的生理意义是作为脑组织间液排出的一个主要通路；VRS作为一个隔室，还与头颈部淋巴通路相连接。从病理生理学角度来看，VRS内驻有小胶质细胞，参与局部免疫调节作用。在脑炎、多发性硬化症、HIV脑炎等，VRS可出现局部性免疫反应。VRS还可能作为疾病扩散或肿瘤转移的一个途径。按照所在部位，VRS分为三种类型。①随着豆纹动脉通过前穿质进入基底节区，这里称基底节型；②随着髓质动脉进入大脑半球灰质，跨过HIGH CONVEXITY延伸至白质，称大脑半球型。③也有些学者是出第三种类型，随着来自大脑后动脉的穿通动脉进入中脑的VRS，称中脑型。大脑半球型VRS与年龄明显相关，是脑老化的一个特征，未发现基底节型VRS与年龄有关。在VRS腔中的穿通动脉直径<0.4mm，因此,在MRI上是看不到的。直径<2mm的VRS被认为是代表正常的解剖结构，见于各个年龄组的健康人。20岁以下组出现率23%，21-40岁组出现率33%，41-60岁组出现率28%，61-80岁组出现率33%，超过80岁者出现率18%。VRS常见于基底节区，达35%，半卵圆中心相对少些，约13%。直径>2mm的VRS被认为是VRS扩大。还见有巨大VRS、海绵状VRS等。扩大的VRS的特征是边界光滑清楚，呈圆形或线形（由于部位和切面不同），与穿通动脉的行径相一致，在MRI的T1WI、T2WI和FLAIR序列上与脑脊液信号是相同的。无对比剂增强效应，无占位效应。FLAIR对于区别VRS和缺血灶非常有用，缺血灶呈高信号区域，而VRS与CSF的信号相同，呈低信号改变。大的VRS常常最先出现在前穿质的穿通动脉周围，于MRI横断面在前连合周围可以看到，既使在年轻人也有可能看到。另一个典型部位是头顶部附近。随着年龄增大，可见于脑白质半卵圆中心、基底节和海马等部位。VRS异常扩大的机制还不清楚，提出的解释有:①VRS与年龄明显相关，提示VRS扩大可能是脑老化的表现。在老年脑，血管增粗、扭曲，造成血管周围间隙的扩大；CSF隔室的弥漫性增加也参与了血管周围间隙的扩大；脑实质的萎缩也可引起VRS扩大，又称作“ex vacuo”现象。在正常人，大脑白质也可出现许多细针孔样改变，常常含有开放的血管，称为筛网状态。②在一些病理状态如Binswanger皮质下动脉硬化性脑病，神经病理学表现为动脉硬化性改变或坏死性动脉炎，动脉壁通透性增加可能使VRS增大。③动物研究证明，脑组织间液沿VRS进入蛛网膜下腔，再经过淋巴通路到达颈部淋巴结。因此，脑淋巴排除通路的障碍也是造成某些VRS扩大的原因。④在另外一些病理状态，VRS在水溶性产物的转运中起作用。⑤在其它一些情况如脑炎、脑膜炎、多发性硬化等，VRS中存在炎性细胞，可能在T淋巴细胞和B淋巴细胞介导的免疫反应中起主要作用。女性，58岁，隐球菌。头痛和发烧，人体免疫缺陷病毒阳性。从脑

安全教育平台登录不上去怎么办：安全教育平台登录不上去是网络问题多刷新几次就好了。首先，要确定你输入的账号和密码是否正确，其次，如果确定账号和密码无误的情况下，看下平台是否不兼容你目前使用的浏览器，更换浏览器试试，再次，如果这个时候还不行，那你就找回密码。最后，找回密码还是不行的话，那可能是网站的数据库出问题了，马上联系网站管理员，如果不是账号问题的话可能是网络问题，或者是登录的人多登不进去，可以多刷新几次再登录，或者等登录的人少的时间段再登录试试。全教育平台的服务内容根据中小学公共安全教育指导纲要的各项要求，科学，系统地开展安全教育，学校安全教育信息服务平台服务体系由四体系一库构成，安全教育课程体系，安全技能训练体系、安全活动开展体系，安全教育测评体系及安全教育教学资源库。学校安全教育服务体系已经在部分城市和学校进行了两年的试点，总结了大量的经验，初步形成了一个实践性、实用性和实效性相结合的服务体系，中国教育学会坚持以学术立会。

solidwork 吃CPU主频，内存要求很高。MACOS优化很牛逼，但是这个软件没有苹果系统的，就只能装win系统，这样苹果优化加成就没了。(用虚拟机运行对配置要求进一步提高，得不偿失)macbook只有 pro的高配适合做设计。air那只是拿来办公可以。如果需要大量计算的话，苹果本的散热实在很差，也就发挥不了实际性能了。具体还得看你的使用强度决定。反正运行是没有问题的。所以真 要用到这类软件，除了台式机 就是戴尔惠普等的工作站本更适合。

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盲山的真实人物原型中叫作郑秀丽。郑秀丽被人贩子以300块卖给了农民郭美南为妻，在最初被拐卖的时候，郑秀丽就伺机逃跑，但是随后马上被全村人抓了回来，并且进行了一顿痛打。之后她也尝试过几次逃跑，但是都没有成功。盲山的信息盲山是由StudioCanal公司制片，由李杨执导，黄璐、杨幼安、贺运乐主演的一部剧情片。该片讲述一名女大学生被人贩子拐卖至某法盲山区，多年后才被解救出盲山的故事，2007年11月23日在中国大陆发行，获得罗马电影节最佳导演奖。该片中演郑小兰的演员，真的就是从四川一个县城给骗嫁到那村里。该片开拍前，原来的投资人因故退出了，李杨自己筹集400万元拍了这个电影，为了拍摄盲山李杨甚至抵押了房子。

安全教育平台的账号是不开放注册账号的，忘记安全教育平台账号和密码需咨询学校管理员，学校管理员添加帐号后才会生成一个账号密码。下面给大家整理了相关的内容分享，感兴趣的小伙伴不要错过，赶快来看一下吧！如果忘记密码可以通过可以通过安全教育平台的微信公众号来查找账号和密码的。具体的步骤如下：1、先打开微信，点击微信的“公众号”，进入到公众号搜索页面，如下图所示：2、在微信公众号里输入“青岛市学生安全教育平台”后，关注公众号，点击并进入公众号，如下图所示：3、进入“学生安全教育平台”公众号后，下方会有三个菜单项，点击中间的“查询账号”菜单，如下图所示：4、进入“查询账号“页面后，在页面上按照提示要求输入需要填写的学生相关信息，输入完成后，点击提交下一步。如下图所示：5、在进入提交页面后，就可以看到自己的账号和密码，账号是学生名字全拼，比如学生姓名是李木翰，那么账号就是limuhan，密码是123456，用这个账号密码可以直接登录平台的。如下图所示：

〖等下。〗

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相对论是一套理论体系，没有详细的定义。下面是爱因斯坦写相对论的科普读物中的一章，可略见一斑：18. Special and General Principle of RelativityTHE BASAL principle, which was the pivot of all our previous considerations, was the special principle of relativity, i.e. the principle of the physical relativity of all uniform motion. Let us once more analyse its meaning carefully.It was at all times clear that, from the point of view of the idea it conveys to us, every motion must only be considered as a relative motion. Returning to the illustration we have frequently used of the embankment and the railway carriage, we can express the fact of the motion here taking place in the following two forms, both of which are equally justifiable:a. The carriage is in motion relative to the embankment.b. The embankment is in motion relative to the carriage.In (a) the embankment, in (b) the carriage, serves as the body of reference in our statement of the motion taking place. If it is simply a question of detecting or of describing the motion involved, it is in principle immaterial to what reference-body we refer the motion. As already mentioned, this is self-evident, but it must not be confused with the much more comprehensive statement called “the principle of relativity,” which we have taken as the basis of our investigations.The principle we have made use of not only maintains that we may equally well choose the carriage or the embankment as our reference-body for the description of any event (for this, too, is self-evident). Our principle rather asserts what follows: If we formulate the general laws of nature as they are obtained from experience, by making use ofa. the embankment as reference-body,b. the railway carriage as reference-body,then these general laws of nature (e.g. the laws of mechanics or the law of the propagation of light in vacuo) have exactly the same form in both cases. This can also be expressed as follows: For the physical description of natural processes, neither of the reference-bodies K, K" is unique (lit. “specially marked out”) as compared with the other. Unlike the first, this latter statement need not of necessity hold a priori; it is not contained in the conceptions of “motion” and “reference body” and derivable from them; only experience can decide as to its correctness or incorrectness.Up to the present, however, we have by no means maintained the equivalence of all bodies of reference K in connection with the formulation of natural laws. Our course was more on the following lines. In the first place, we started out from the assumption that there exists a reference-body K, whose condition of motion is such that the Galileian law holds with respect to it: A particle left to itself and sufficiently far removed from all other particles moves uniformly in a straight line. With reference to K (Galileian reference-body) the laws of nature were to be as simple as possible. But in addition to K, all bodies of reference K" should be given preference in this sense, and they should be exactly equivalent to K for the formulation of natural laws, provided that they are in a state of uniform rectilinear and non-rotary motion with respect to K; all these bodies of reference are to be regarded as Galileian reference-bodies. The validity of the principle of relativity was assumed only for these reference-bodies, but not for others (e.g. those possessing motion of a different kind). In this sense we speak of the special principle of relativity, or special theory of relativity.In contrast to this we wish to understand by the “general principle of relativity” the following statement: All bodies of reference K, K", etc., are equivalent for the description of natural phenomena (formulation of the general laws of nature), whatever may be their state of motion. But before proceeding farther, it ought to be pointed out that this formulation must be replaced later by a more abstract one, for reasons which will become evident at a later stage.Since the introduction of the special principle of relativity has been justified, every intellect which strives after generalisation must feel the temptation to venture the step towards the general principle of relativity. But a simple and apparently quite reliable consideration seems to suggest that, for the present at any rate, there is little hope of success in such an attempt. Let us imagine ourselves transferred to our old friend the railway carriage, which is travelling at a uniform rate. As long as it is moving uniformly, the occupant of the carriage is not sensible of its motion, and it is for this reason that he can un-reluctantly interpret the facts of the case as indicating that the carriage is at rest, but the embankment in motion. Moreover, according to the special principle of relativity, this interpretation is quite justified also from a physical point of view.If the motion of the carriage is now changed into a non-uniform motion, as for instance by a powerful application of the brakes, then the occupant of the carriage experiences a correspondingly powerful jerk forwards. The retarded motion is manifested in the mechanical behaviour of bodies relative to the person in the railway carriage. The mechanical behaviour is different from that of the case previously considered, and for this reason it would appear to be impossible that the same mechanical laws hold relatively to the non-uniformly moving carriage, as hold with reference to the carriage when at rest or in uniform motion. At all events it is clear that the Galileian law does not hold with respect to the non-uniformly moving carriage. Because of this, we feel compelled at the present juncture to grant a kind of absolute physical reality to non-uniform motion, in opposition to the general principle of relativity. But in what follows we shall soon see that this conclusion cannot be maintained.

I Love You Love Me Love We"re still together after all that we"ve been throughThey tried to tell you i was not the one for youThey didn"t like my hair, the clothes i love to wearThey didn"t" realize that i was strong enough for twoI love you, love you love me too, love i love youLove me love i love you, love my only true love iLove you love me loveThe things they said about the two of us were liesI knew they couldn"t see the sparkle in your eyesThey said i wouldn"t da...

具体方法如下：1、使用ctrl+shift+delete进入到任务管理器下；先关闭lmgrd.exe进程。2、在server install上右键，以管理员方式运行。3、出现下图的提示后，按任意键结束即可。4、双击桌面的Solidworks2019启动图标。5、启动后的Solidworks2019如下图。6、造成Solidworks2019许可证失败的原因是因为其电脑上还安装了UG软件，默认的情况下，UG软件是先许可证的，然后再启动SW，其就会出现错误；如果你还要使用UG软件，可以先按上述的步骤把SW启动，然后再启动UG的许可证。

　　登陆美国专利商标局网上专利检索patft.uspto.gov/ 　　提供三种检索途径： 　　1、Quick Search 　　2、 Advanced Search 　　3、Number Search 　　在第三项专利号途径中填入专利号码 　　United States Patent 5,382,714 　　Khachik January 17, 1995 　　-------------------------------------------------------------------------------- 　　Process for isolation, purification, and recrystallization of lutein from saponified marigold oleoresin and uses thereof 　　Abstract 　　A method of isolating, purifying and recrystallizing substantially pure lutein, preferably from saponified marigold oleoresin in its pure free form, apart from chemical impurities and other carotenoids. Lutein may be used as an analytical standard or in cancer prevention trials and as a safe and effective color additive for human food. 　　-------------------------------------------------------------------------------- 　　Inventors: Khachik; Frederick (Beltsville, MD) 　　Assignee: The Catholic University of America (Washington, DC) 　　Appl. No.: 08/210,009 　　Filed: March 17, 1994 　　-------------------------------------------------------------------------------- 　　Current U.S. Class: 568/834 ; 568/816; 568/822; 568/823; 568/824; 568/832 　　Current International Class: C07C 35/00 (20060101); C07C 35/21 (20060101); C07C 035/08 (); C07C 035/18 () 　　Field of Search: 568/810,816,819,700,822,823,824,832,834,913 435/67 426/540,310 　　-------------------------------------------------------------------------------- 　　References Cited [Referenced By] 　　-------------------------------------------------------------------------------- 　　U.S. Patent Documents 　　2527602 October 1950 Wall 　　3732214 May 1973 Surmatis et al. 　　3879424 April 1975 Surmatis et al. 　　4028217 June 1977 Okada et al. 　　4048203 September 1977 Philip 　　4316917 February 1982 Antoshkiw et al. 　　4851339 July 1989 Hills 　　4871551 October 1989 Spencer 　　5019668 May 1991 Keat et al. 　　Foreign Patent Documents 　　0096032 Jun., 1983 JP 　　Primary Examiner: Lone; Werren B. 　　Attorney, Agent or Firm: Zarley, McKee, Thomte, Voorhees & Sease 　　-------------------------------------------------------------------------------- 　　Claims 　　-------------------------------------------------------------------------------- 　　What is claimed is: 　　1. The carotenoid composition consisting essentially of substantially pure lutein crystals derived from plant extracts that contain lutein, said lutein crystals being of the formula: ##STR2## wherein the lutein is substantially free from other carotenoids and chemical impurities found in the natural form of lutein in the plant extract. 　　2. The lutein carotenoid composition of claim 1 wherein the plant extract is derived from naturally occurring plants selected from the group consisting of fruits, vegetables and marigolds. 　　3. The lutein carotenoid composition of claim 1 admixed with an edible triglyceride oil to provide a dose form. 　　4. The lutein carotenoid composition of claim 1 wherein the lutein is derived from marigold flower extract. 　　5. A method of obtaining substantially pure, free form lutein crystals from saponified marigold extract, comprising the steps of: 　　(a) mixing the marigold extract with water/alcohol mixture remove soluble impurities; 　　(b) lowering the temperature of the mixture to a temperature to precipitate lutein crystals; 　　(c) washing the lutein crystals with water to remove water soluble impurities; 　　(d) washing the lutein crystals with an organic solvent mixture to remove organic impurities, and thereafter recrystallizing the lutein. 　　6. The process of claim 5 wherein the recrystallization involves dissolving the lutein crystals in a binary solvent system and thereafter lowering the temperature to recrystallize lutein in substantially pure form free from other carotenoids and chemical impurities. 　　7. The process of claim 6 wherein the binary solvent system is a halogenated organic solvent in which lutein is strongly soluble followed by addition of a second organic solvent in which lutein is only partially soluble. 　　8. The method of claim 7 wherein the halogenated solvent is dichloromethane, chloroform, or 1, 2-dichloroethane. 　　9. The method of claim 8 wherein the halogenated solvent contains a small but effective amount of an organic base to neutralize trace amounts of acids that are normally present in halogenated solvents. 　　10. The process of claim 9 wherein the organic base is triethylamine. 　　11. The process of claim 10 wherein triethylamine is present at about 1% by volume of the added halogenated solvent. 　　12. The process of claim 7 wherein the organic solvent is a straight chain hydrocarbon. 　　13. The method of claim 5 wherein the ratio of water to alcohol is 2.3 to 1 in step (a). 　　14. The method of claim 5 wherein the alcohol in step (a) is selected from the group consisting of ethanol, methanol and isopropyl alcohol. 　　15. The method of claim 6 wherein the temperature is lowered within the range of from about 5.degree. C. to about 10.degree. C. 　　16. The method of claim 5 wherein the organic solvent mixture in step (d) includes a straight chain hydrocarbon solvent and an alcohol. 　　17. The method of claim 16 wherein the temperature of the alcohol and the organic solvent is from about 0.degree. C. to about 5.degree. C. 　　18. The method of claim 7 wherein the ratio of the halogenated organic solvent and the second organic solvent is 1:1. 　　19. The method of claim 6 wherein the temperature of the solution is lowered to within the range of from -20.degree. C. to -10.degree. C. for from 2 to about 3 hours. 　　20. The method of claim 6 wherein the recrystallized lutein is dried in vacuo at 50.degree. C. for 3 days. 　　--------------------------------------------------------------------------------

说白了就是nbl是甲b cba甲a