对……有坏处用英语怎么说用bad说

在丰富多彩的生物界中,蕴含着形形色色的变异现象.在这些变异现象中,有的仅仅是由于环境因素的影响造成的,并没有引起生物体内的遗传物质的变化,因而不能够遗传下去,属于不遗传的变异.有的变异现象是由于生殖细胞内的遗传物质的改变引起的,因而能够遗传给后代,属于可遗传的变异.可遗传的变异有三种来源：基因突变,基因重组,染色体变异.
生物的变异是不定向的,生物都是生活在一定的环境中,而环境是不断变化的,生物产生的大部分变异不能适应变化的环境,因此我们说生物的变异大多对生物有害,只有少数变异有利于生物.对很多生物而言,不利变异往往导致其很严重的后果,再严重点就会导致丧失生命.如人类的白化病、血友病、多指（趾）症等；植物的花叶病等都是不利变异造成的.
希望能对你有所帮助.

在丰富多彩的生物界中,蕴含着形形色色的变异现象.在这些变异现象中,有的仅仅是由于环境因素的影响造成的,并没有引起生物体内的遗传物质的变化,因而不能够遗传下去,属于不遗传的变异.有的变异现象是由于生殖细胞内的遗传物质的改变引起的,因而能够遗传给后代,属于可遗传的变异.可遗传的变异有三种来源：基因突变,基因重组,染色体变异.
生物的变异是不定向的,生物都是生活在一定的环境中,而环境是不断变化的,生物产生的大部分变异不能适应变化的环境,因此我们说生物的变异大多对生物有害,只有少数变异有利于生物.对很多生物而言,不利变异往往导致其很严重的后果,再严重点就会导致丧失生命.如人类的白化病、血友病、多指（趾）症等；植物的花叶病等都是不利变异造成的.
希望能对你有所帮助

哎呀,女生心里成熟早,感情细腻些,能有点小家碧玉的情怀,但是男生同样是豪放的,金戈铁马,你们老师说的还是有点不对的,不要在意.

▲ vision harm: the use of computer, the eyes the mostvulnerable, especially easy to cause the juvenile myopia andciliary spasm. These are called "computer vision syndrome"disease is a kind of pressure type diseases, because eye long time staring at one place, blink and usually only 1/3, thus reducing the secretion of intraocular lubricant. So long, in addition to cause eye fatigue, heavy shadow, blurred vision, will cause other discomfort. In front of the screen should blink, in order to increase the lacrimal gland secretion, moisturizing eye.The most effective method is the proper rest, eat more foods containing vitamin A, rhodopsin supplement on the retina, such as carrots, cabbage, bean sprouts, tofu, red dates, oranges,milk, egg, animal liver, lean meat and other.

Watching TV will damage the cornea,still can let the brain energy is not focused,and even evacuated

TV is very important in our life.We can get to know all kinds of events around the world.We can know the weather,information,laws,knowledge and so on.After busy work,we can watch some funny programs to relax　　TV benifits us,but sometimes it has bad influence.Some students watch TV day and night.It influences their lessons.Some programs are not good for children.　　So we should choose proper programs at proper time for people in different ages.　　电视在我们生活中非常重要,我们可以了解世界各地的事件.我们能了解天气、信息、法律、文化知识等等.忙碌的工作后我们可以看一些娱乐节目放松自己.　　电视为我们带来了好处,但它也有坏影响.一些学生日夜看电视,这影响了他们的功课.一些节目不适合孩子们看.　　所以我们应该按照不同的年龄,在合适的时间选取合适的节目看.　　Now TV has become necessary in our life.We can get all kinds of information through TV.The world is in front of us.The distance between countries is shortened with the help of TV.Every day we can watch some interesting programs to make us happy.　　Although TV has some benifits,sometimes it has bad influence.Some students have no time to study because they watch TV in all the free time.And some programs are not proper for children.　　So we should choose some good programs to watch,especially for children.　　现在电视已经是我们生活中的必需品.我们可以通过电视获取各种信息.世界呈现在我们面前,国与国之间的距离因为电视变近了.每天我们看一些有趣的节目,这使我们很愉快.　　虽然电视有一些好处,有时它也有坏影响.一些学生没有时间学习,因为他们把所有空闲时间都用于看电视.还有一些节目不适合孩子们.　　所以我们应该选取一些好节目来看,特别是对孩子们.
E智网为你解答,

Below are the Pros and Cons of watching TV.
Pros:
1.) Entertainment and Laughter
We are entertained by shows we love to watch.We laugh at things we find funny and comical in the TV program we are watching.
2.) Information and How-To
We learn a lot of information about places and people that we usually don't learn on magazines,books and newspapers.We also easily learn how to cook new recipes by watching cooking shows and we can learn doing some other stuff through programs that show step-by-step procedures of performing a particular work,exercise or other interesting stuff.
3.) Improve Memory and Easy Learning
We usually take note of the time schedule for our favorite programs especially if it is only shown once or twice a week.We tend to store and recall the things that recently happened in our favorite show before the next episode will be shown on TV.This will help enhance our memory which we can apply on our daily life.
4.) Bonding With Family and Friends
Watching TV is a great way to bond with family and friends especially on weekends.You can laugh and discuss things that you see on TV.That can be really fun.
Cons:
1.) Decline in creativity and imagination.
TV shows including commercials have tendency to share their creative works on us and impart their ideas and opinions on us which is not favorable and can lead to a decline in our creativity and imagination since we can not think on our own since creative stuff are readily available and shared to us.
2.) Health problems
We usually eat junk foods or any of our favorite snacks while watching TV.This is not good for our health because we tend to eat a lot while we are sitting down facing the television.This can lead to obesity since we don't move a lot when we watch TV.This can also lead to other serious ailments caused by eating a lot and moving less.
3.) Makes people lazy
Most of us get hooked when watching programs of our favorite TV channel.We sometimes even forget to do our work or other important things because we got engaged in the show we are watching.Some people forget to do their household chores because they would rather watch TV than work.
4.) Some shows don't teach good values.
There are TV programs that do not teach good values particularly to children.Instead of teaching them good deeds they even imitate,re-enact or spoof important things happening around us which is not good for children to watch.

好处:提高写作水平,锻炼语文阅读能力 坏处:耽误做数学英语的时间,使3科时间不均衡

Dormitory living quarters and live their own advantages and disadvantages of both,I would like to talk about my point of view,has the following disadvantages:a few inconveniences,distu

TV is very important in our life.We can get to know all kinds of events around the world.We can know the weather,information,laws,knowledge and so on.After busy work,we can watch some funny programs to relax　　TV benifits us,but sometimes it has bad influence.Some students watch TV day and night.It influences their lessons.Some programs are not good for children.　　So we should choose proper programs at proper time for people in different ages.　　电视在我们生活中非常重要,我们可以了解世界各地的事件.我们能了解天气、信息、法律、文化知识等等.忙碌的工作后我们可以看一些娱乐节目放松自己.　　电视为我们带来了好处,但它也有坏影响.一些学生日夜看电视,这影响了他们的功课.一些节目不适合孩子们看.　　所以我们应该按照不同的年龄,在合适的时间选取合适的节目看.　　Now TV has become necessary in our life.We can get all kinds of information through TV.The world is in front of us.The distance between countries is shortened with the help of TV.Every day we can watch some interesting programs to make us happy.　　Although TV has some benifits,sometimes it has bad influence.Some students have no time to study because they watch TV in all the free time.And some programs are not proper for children.　　So we should choose some good programs to watch,especially for children.　　现在电视已经是我们生活中的必需品.我们可以通过电视获取各种信息.世界呈现在我们面前,国与国之间的距离因为电视变近了.每天我们看一些有趣的节目,这使我们很愉快.　　虽然电视有一些好处,有时它也有坏影响.一些学生没有时间学习,因为他们把所有空闲时间都用于看电视.还有一些节目不适合孩子们.　　所以我们应该选取一些好节目来看,特别是对孩子们.

The advantages of plastic bags are convenient,easy to carry,cheap and can be thrown into the garbage once used up.However,there are more disadvantages.For example,it pollutes the environment and it's one of the main sources of white pollution.It will produce poisonous gas after burned,which will damage people's health.What's more,it absorb dirts and it's not easy to keep clean.

解题思路：（1）水平面上的物体，对支撑面的压力等于其重力；压强与受力面积和压力大小有关；压力越大、压强越大；
（2）物体的惯性与质量有关，质量越大惯性越大．

（1）车辆超载时质量大，则车的惯性太大，易发生交通事故．
（2）超载时质量大，重力大，对地面压力就大；故在受力面积一定时，因压力太大而造成对路面的压强太大，损坏路面．

点评：
本题考点： 压强；惯性．

考点点评： 此题是开放题，运用惯性知识、压强大小知识；即可解答．

My favourite job
我最喜欢的工作
We all know about that there are various kinds of jobs in the world, but what kind of job do you like?Because different people are attracted by different jobs, everyone has his own interest and destination,For example Many people consider an ideal job as a means of making more money and living more comfortably.It may sound reasonable because money is the foundation of life.
我们都知道,这个世界上有许多不同的工作,但是做什么工作才是你最喜欢的呢?人与人之间兴趣不同,个性各异,所以大家对工作的选择也是不一样的.例如,许多人把一个理想的工作当做是赚更多的钱和活得更舒服的手段.这也许听起来很合理,因为金钱是生活的基础.
As far as my ideal job is concerned, I think I want to be a psychologist.I have made up my mind to do what I really want to so that I can realize my idea.I believe interest is of the utmost importance in choosing a job.I have been interested in psychology for a long time, so I want to be a psychologist in the future.I think being a psychologist can help lots of people lead a happier life.
至于我的理想工作,我想成为一名心理学家.我已下定决心要做我真正想要做的事,这样我才可以实现我的理想.我坚信在择业中,兴趣是最重要的.很久以前我就对心理学感兴趣,所以我将来想成为一名心理学家.我觉得成为一个心理学家可以帮助很多人过一个更快乐的生活.
However, it isn't easy for me to become a qualified psychologist and many people around me think that it's unrealistic to me.NevertheLess, I'll make every effort to gain much more knowLedge, patience, methods, etc. to live up to the name of a qualified psychologist, I believe my dream will come true someday.
但是,成为一个合格的心理学家对于我来说并不容易而且我周围的许多人都认为这对我来说是不现实的.不过,我将尽一切努力来获得更多的知识、耐心、方法等来配得上合格的心理学家这个名字. 我相信我的梦想总有一天会实现的.

With the fantastic spur both in industry and in economy in China,the number of people who own private cars is on the rise.Some people have bought cars of their own,and others are planning to buy cars....

I think the worst thing for transnational marriage is perhaps the dirrerences between their cultural background.

经常吸入燃烧塑料物体的气体对身体是有坏处的,很多塑料燃烧后都产生多环芳香烃,其中有苯丙芘、二恶英等致癌物质.

1朋友少.
2容易上当受骗.
3害人害己.

害处？那就多啦！但是把握得好，还是很有用的，所谓娱教娱乐就是这样的嘛~！适当的游戏有益身心健康。危害呢，自己看吧首先，玩电脑游戏，是需要时间的，如果玩电脑游戏的时间过多的话，那么，我们用来学习的时间就必然会大大地减少，除非是不用学习一看就会的天才，就我们这些普通人而言，学习成绩不下降才怪呢！其次，玩电脑游戏，尤其是长时间地玩，对我们的视力和健康十分有害，当你沉迷在电脑游戏带给你的快乐中时，你的视力也在不知不觉中一天天地衰退，等你最后醒悟时，已经来不及了！可能还要搭上你曾经拥有过的健康身体。再次，玩电脑游戏，特别浪费金钱，作为小学生的我们，零花钱主要依赖于我们的父母大人所赐，试想一下，谁家的父母愿意很爽快地给钱让我们去上网玩游戏呢？所以，为了能够进网吧上网玩电脑游戏，我们必然会巧立名目向我们的父母索取，要不然就东拼西凑、挖空心思地弄钱，哪里还有心思学习，有的同学甚至因此而走上了犯罪的不归路，这又是何苦呢？电脑游戏还有很多的危害，我就不再一一列举了。也许有的人可能会不服气，你说了那么多电脑游戏的害处，难道电脑游戏就没有一点益处了吗？起码玩电脑游戏可以锻炼、提高我们的反应能力和手脑的快速配合能力，可以帮助我们了解电脑、认识电脑、学习电脑，可以使我们在紧张的学习中得到放松，好处还是很多的嘛！何况，很多的大人不是照样沉迷在电脑游戏中吗？玩电脑游戏，也许的的确确有这样、那样的一些好处，但是，好处与坏处权衡起来，我认为，玩电脑游戏，弊远远大于利，所以，我仍然坚信，为了我们自己的将来，同学们，请远离电脑游戏吧！山东临沂罗庄区临沂第八实验小学四年级:宋天宇

The Internet in our life
Internet plays a very important role in everybody's life,It has made a huge difference in the world,But the Internet has some advantages and disadvantages.
First of all,The World Wide Web contains huge amount of information.It is extensive,relatively easy to access,And provides virtually unlimited information.If we need some information,We can acquire information online.The Web provides us an excellent resource to gain knowledge,From this way we can gain current information we need it now.
Online education is very important in our life,It can gives us excellent sources of information,saves our time,money and it is extremely convenient.In addition,we also can exchange thoughts,opinions and information with our classmates without leaving our house.Sometimes,If we feels very stressed and depressed,We can listen to songs,In order to have a well-balanced life.
But the Internet also has some harmful.Somebody indulges in the network games.They standing in the internet bar day and night ,At the end they leaves uncultivated the studies.
Overall,Internet has become an inseparable part of our life.Only when we can make it serve our needs.Can we benefit most from it.So,please use the Internet in a proper way.
My idears about the Internet
Once talking about the Internet,you will feel that it is old and familiar.As you know ,the Internet came to China in 1994.With the society’s fast development,it is a necessary part in our life.
When we take a wide view for the Internet in history,it looks like a coin which has two sides.However,it’s no double that useful sides are more than harmful sides,I think.
Do you think so?It allows us to send e-mails and chalk with other pleople.Besides,it gives us information on all sides,which helps to widen our horizon.Such as The Word Expo in 2010 Shanghai,which many people pay attion to.We can get new information without going out.Otherwise,it is clear that the education through the Internet is very popular.Now the long-rage education takes an important role.For us,a nearby screen is showing videos and lectures when we go to class.this way breaks the ancient ways and draws student’s attention to improve the efficiency.the Internet’s application gradually covers military,business and so on.
On the other hand,it can provide some ways of destorying people’s life.The bad information has caused some trouble to consummers.Aboviously,some have been taken in when they buy goods on the Internet,what’s worse,many poor self-controlled people are so addicted to computer games that they will waste some time and money and even wave good-bye to the school work.
In a word,the Internet is a sword that it oneself has no error.The key is how to use it.

disadvantages
1 they might think that tipping is a dirty thing to do
2 they might feel like they don't deserve it
3 they think it ashme to accept someone's tip
4 they might think they look like a begge

D

老大,怎么也给点分数
这样大家比较积极嘛~~~~
开玩笑啦
你要写什么方面的呢?
作文,作为学生的你应该还是自己发挥比较好
你先自己写一篇,我来帮你修改、订正怎样?

misleading and cheating-mislead and cheated 应为被动
as good as what they say 缺少宾语
interrupt,...fill up,...,jump out,...ring 应为并列
How aren`t we disgusted at them sth disgusts s

用90度以下的水说明.杯子是不能用来装开水的.因为会这样写的杯子一般都是塑料杯.而不同材料的塑料能承受的热度是不同的.有些塑料可能在100度的温度下会释放某些物质.对身体始终太好..你可以看下杯底应该有个循环三角形的标识.里面有个数字..你可以上网查一下分别代表什么材质..不同的材质的性能是不同的..就像有的饭盒能进微波炉有得不能也是因为材料的问题..

好处就是可以很容易获得几辈人流传下来的经典,充实自己,不费吹灰之力
坏处就是容易流于教条化,一味追求经典,没有自己的个性,不懂得创新,禁锢住思想,从而只模仿别人.

勿以恶小而为之,勿以善小而不为.

not only but also

雪的心事
文:长发迎空
北方.冬日.弦月.霓虹.第一场雪开始飘散.
一个人坐在一帘雪雾的背后,听雪落的声音.飘坠的枯叶很快被积雪掩盖,如同一粒微尘瞬间消失,随同我的记忆,一起沉沦.
似乎每一年的冬天都是这样度过,蜷缩在自己温暖的小屋,点一盏袅袅的灯,听着音乐,啜着热气腾腾的茶,读着喜欢的书,看着窗外滑过的风霜雨雪,一年一年,周而复始.我愿就这样栖息在自己的城堡中,静静地看岁月年华,如水流逝.不知岁月的痕迹,是否已挂上了我的脸,是否已刻在了我的心头.我知道终有一天,我的眼睛不再如雪花般清澈.多年后的一场大雪,是否会记取当年那个雪幕后的女子,曾经的过往,如雪的心事.
抬眼望路上的行人,个个脚步匆匆.冬至还未到,此刻的寒冷尚不算刺骨,想必一个人孤零零地走在路上,看那些将落未落的残叶飘摇欲坠,会感到稍许的凄凉,会顿觉家的温暖,会不由自主加快了脚步.又想起了那句古诗,“柴门闻犬吠,风雪夜归人”.想到这,便不由得想笑,不是笑别人,而是自己.终日坐在屋中胡思乱想,真实与虚幻已模糊得分辨不清,许多情景明明从未经历过,也永难实现,却又不可名状地熟悉与惊悸.仿若心中生出了翅膀,穿越时空,飘飘荡荡,替我飞过了一程又一程.原来想象也可以如此真实,也可以如此荒唐.
忽然想起多年前的一首老歌：把情感收藏起来,让回忆留下空白,忘了曾经拥有的过去,永远永远不再说爱……喜欢这些淳淳的老歌,只言片语便解尽所有的忧愁.当年飘渺的诺言,能实现的会有几句?不得而知,也无力证明.只是知道它再也带不来丝毫的兴奋或是晕眩,便如夜空中绽放的烟花,美丽属于她只有一瞬,狂风吹散,繁华落幕,一切归于空无.
月色雪影摇窗而入,洒在窗畔桌前,洒上我的额头,沁润我的灵魂.指尖再度飞舞,倾诉她的寂寞.不过是一场游戏一场梦,只是这样的游戏规则无常,这样的梦,看得到彼岸,却无法泅渡.这场戏很精彩,该上演的时候上演,该落幕的时候落幕.这场游戏很无奈,从清晰到模糊,从春花到秋露.如风一缕,雪一幕,随意沉浮,不知方向如何,不知终点何处.
“去的尽管去了,来的尽管来着；去来的中间,又怎样的匆匆呢?”朱自清先生笔下的《匆匆》让我叹息不已,原来一切注定匆匆,穷我一生,也无法追逐.
窗外的雪已住.我停在原地,像是一只舞倦的蝴蝶,无力飞去.
雪
雪是一种能够令人产生多种情绪的东西…… 当窗外那像柳絮、像芦花般的雪花,正在纷纷扬扬地从天而降的时候,当大地被雪花装饰得像铺上白色的地毯一样的时候,站在窗户边上,望望它们,会有许许多多的感觉：它们使我心情愉快,即使是遇上了不痛快的事情,我也会感觉到心情很通畅.
雪花很白很白,白得那么纯洁.它们把大地变得也很纯洁、很美丽.我有种这样的感觉：雪不仅仅使万物变得纯洁,也使人们的心灵变得像它一样美丽、纯洁.
这时,一片雪花沾到窗户上,又立刻化了.我想：雪也许会在停了以后,很快就化了.我真有点舍不得它们化掉.但是,雪终究会化的.但它短暂的“生命”却能够保护植物、湿润并清洁空气.我认为它是最无私的,它在默默地奉献着它的“一生”.
“雪绒花,雪绒花……”当我看着雪花正在洗礼着这个世界的时候,《雪绒花》的旋律会在我的脑子里回荡.这曲子那抒情的旋律,能够准确地表现出雪的美好.但愿雪能够真的如《雪绒花》中说的,祝福我们的祖国、祝福全世界和平.
我留恋这些雪,因为它们也曾有过美丽的时候.当雪停了,阳光又一次照射着大地.一阵风吹来,把地上、树枝上的松雪吹起,在蓝蓝的天空中飞扬,阳光使它变得更加晶莹.我这时感觉到了雪正用这最后时间,把自己最后的美丽全部展现出来,然后就默默逝去,化为水去滋润大地.
这是冬天的第一场雪,也是2005年中的第一场雪.
早晨六点多钟,我刚起床,就听见爸爸说外面下雪啦!我听后,连忙跑到窗外一看,啊!只见天地之间白茫茫的一片,雪花纷纷扬扬的从天上飘落下来,四周像拉起了白色的帐篷,大地立刻变得银装素 裹.我不禁想起一句诗“忽如一夜春风来,千树万树梨花开”真美呀!
那雪花洁白如玉,它是天宫派下的小天将,还是月宫桂树上落下的玉叶呢?雪花像美丽的玉色蝴蝶,似舞如醉；像吹落的蒲公英；似飘如飞；像天使赏赠的小白花儿；忽散忽聚,飘飘悠悠,轻轻盈盈,无愧是大地的杰作!只见眼前的雪花像蝴蝶一样调皮,一会儿落在屋檐下,一会落在树枝上,还不时飘在行人的脸上.
看,雪中的人儿,不,是朝气蓬勃的同学们,追呀,跑呀,跳呀,笑呀,与青松并立.雪下得更大了,变成了鹅毛大雪.我和同学们走出教室,跑到操场上,不管天气多么冷,雪下的多么大,就算雪大到我们热乎乎的脸上也不在乎,因为我们实在是太高兴、太开心呀!又可以打雪仗、堆雪人.
雪是冬的使者,尤其是这第一场雪,它预报着冬天的到来,我爱雪花,因为它美丽、纯洁、无私,能给大地带来欢乐.

Chinese parents should let go and let children make their own decisions
These three features together,make the child feel stifled,they actually had a deep dissatisfaction with their parents,but can not be expressed in a proactive manner,so on the use of the passive approach.
"The value of life lies in choice,but parents often forget this,they will not let their children choose to do,they always can not help but be asked to choose a child to do." Qifeng Zeng said,"but nothing for the child if the parents call the shots,then it is nothing short of killing the child's life."
Qifeng Zeng stressed that this is not a philosophy of preaching,in fact,is the children's personal experience.A regular life to make decisions for their own children,and his vitality is Wang Yang Zi Si,even though as young,he will encounter some setbacks,but those setbacks and achievements in the final together,let him feel his life is colorful "More importantly,this is their own."
On the contrary,if the child only in accordance with the parents decided to do it.So,these decisions more correctly,their sense of suffocation may be stronger.On the one hand,the children get more and more resources,ability to become stronger,but on the other hand,his passion for life,but will be getting lower and lower.They feel that,so the parents would like to say no,but they also always been taught that toe the line,so even do not they can not be said,and had to use a passive approach to humiliate their parents.
This will achieve our objective,because the control of a strong desire of the parents,often produce a sense of powerlessness,they often find that children really obedient,the child is indeed hard,the road is indeed correct,but that does not produce good results.
"This is because the children cry,I hate you strong arrangements,I have to pass part of my own life." Qifeng Zeng said.
To improve this,the best way is to "appropriate hands-off",that parents give their children to develop a basic bottom line - serious life do no evil,and leave their children to decide their own life,only when it is very necessary to go help the child.
And,he stressed that parents must refrain from the name of "communication" in the name,forcing the child to communicate with him,because,like children and adults would like to have a hidden space.If the parents spy on their children too fond of all the secrets,then this child
Qifeng Zeng said that he had two basic principles of psychology to give all of the parents:
If the child is not secret,it Mody kids never grow up.
If the parents call the shots for their children everything,it is to kill a child's life.

Benefits: 1. At home "shopping" without time limit orders; 2. A lot of goods to obtain more information, you can not buy local goods; 3., On-line than the traditional cash payment to pay more secure, to avoid lost or was robbed of cash; No. 4, from ordering, when buying the goods do not come in person at the scene, is both time and effort; 5, as a result of eliminating rent online merchandise store, store employees and called a series of cost of custody, on the whole than the average prices of similar goods, shopping malls and cheaper. Disadvantages: 1. Only to see the picture, it is possible and do not like the real thing. 2. The need to increase postage, mailing, etc. but also over. 好处:1.可以在家“逛商店”,订货不受时间的限制； 2.获得较大量的商品信息,可以买到当地没有的商品； 3.,网上支付较传统拿现金支付更加安全,可避免现金丢失或遭到抢劫； 4.从订货、买货到货物上门无需亲临现场,既省时又省力； 5.由于网上商品省去租店面、召雇员及储存保管等一系列费用,总的来说其价格较 一 般商场的同类商品更便宜. 坏处：1.只能是看到图片,有可能和真品不太一样. 2.需要加邮费,而且还得等邮寄过来

80个字?把好处和坏处列举出来就行啦

Many people appreciate the conveniences of the city.People in the city can seefilms,visit exhibitions and watch games every day if they like to.Furthermore,if they want to Become scholars,scientists or artists,they can find what they need in the city:libraries,colleges,museums,and so on.The last But not the least important thing I'd like to say is that they can get to know as many people as they want in the city.
But some other people are attracted by the beauty of the country.First,if one is in the country he feels he is closer to nature:small streams,high mountains,fresh air,green grass and so on,all this makes people happy and stirs up the love of life.Second,in the country,people seem to have more freedom.They can sing high in the field,ride horses along a brook and do some interesting farm work.
Of course,both the city and the country have their disadvantnges.As for the city,there is pollution,noise and heavy traffic.And as far as the country is concerned,its inefficient transportation,delayed news always make people feel isolated.
Compared with cities,the country is relatively backward,but nothing can be com pared with the clean atmosphere and the gentle pace of living.Living in the country is very good for your health.With the deveJopment of economy,it is a trend that people will migrate from the city to the country.

物种灭绝、温室效应、海平面上升、臭氧层出现空洞、紫外线强烈、气候改变、沙尘暴、海啸频发、等各种恶劣的天气出现.近几年,各种疾病突发,如：非典、痢疾、肠炎等.
人类改变地球,最终,地球也会毁灭人类.

旅游的好处大家都知道，它可以舒缓我们身心的疲惫，调节心情，有利于我们的身心健康。还可以游览名山大川，品尝天下美食，了解民俗文化，结交朋友，促进家人之间的感情。它的好处说也说不完。当然，凡事都有利有弊，旅游也不例外，它很费钱，也会很辛苦，身体不好是经不起旅途的劳累的，旅游中还会发生许多意想不到的事情。...

好处：死多D唔洗人口过多搞乜计划生育,优生优育

先采纳,马上写!~~~

译文如下：
the advantages and disadvantages of a large population
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没有月亮,地球不会产生生命

Most of us who like watching TV,watching TV is bad,both good and according to the table,please write an English composition,about 60 words.
Advantage:helps us to understand things,bored to help us to kill time,some programs can help us learn many extracurricular knowledge
Disadvantages:TV watching TV,most hurt eyes too long,long time to sit,lack of exercise,harmful to health,and some programs are not proper for teenagers watch,they will bring us a bad influence.

Mobile phone has a lot of merits.
First of all,it is much more convenient than regular phone.You can make a phone call wherever you are.If you are ill or see an accident,you need an ambulance to come at once.Mobile phone can save your life.
Secondly,to send short messages is much cheaper than to make a phone call.
Last but not least,nowadays,mobile phone has more and more functions.You can take pictures.You can listen to music by using it as a MP3.
All in all,it is a useful tool.It makes our world far smaller than ever and shorten the distance between people.
Nowadays,with the rapid development of IT and information industry,cell phones play a dominant role in towns people's life.But,like everything else,they have both favorable and mffavorahle aspects.
First,it's useful.As a wireless mobile telephone,it's easy and handy to early to wherever one goes and call the callee however far away he is.Therefore,it greatly facilitates people's life.Second,it's convenient.Whenever one meets trouble or something urgent,one can nmke a call immediately.Most important of all,it's a very helpful companion.With a multirfunction cell phone in hand,one can easily get on the Net,browsing the useful information,conducting e-commerce and doing whatever one can do via Internet.
However,just as everything has two sides,the cell phone also has many disadvantages.To begin with,it's expensive to buy and costly to pay the hills,esp.that of global service.To make matters worse,it's also easy to lose and costly to get it repaired.Worst of all,it's not as clear as a family telephone and sometimes the number dialed is often not available.Last but not least,it's alleged the microwaves in it might do harm to people's health.
In my opinion,with its expenses greatly reduced after China's entry into the WTO,it will face an ever brighter future in its development.Someday most of them will be developed into new Intemet-enabled mobile phones,which will be as useful as pocket computers.And I believe its advantages will not only offset its disadvantages,but also far outweigh them.

带罩灯用汞齐灯管,有助于做上功率,保证光参数不漂移,裸灯用低温外置汞通用也是保证可以做较高的功率,保证光参数不漂移,但是要控制好灯的上升时间!

低重频雷达主要用于长脉宽,单脉冲检测（或简单的MTI处理）.对于需要长时间积累,或者是PD雷达来说,低重频就不太合适.
1 脉冲积累确实有问题,因为积累时间太长,目标回波已经不再相干了,或跨距离单元了
2 一般来说,不会影响探测距离,因为可以通过长脉宽来提高能量.如果占空比和总时间相同的话,不同重频的雷达的探测威力是理论上相同的.因为平均功率和能量一样.事实上由于没有积累损耗,低重频雷达的实际探测距离甚至更高.
3 由于重复频率低,所以低重频雷达的不模糊多普勒频率很小,速度模糊比较严重,所以不适合用来测速.
4 低重频雷达抗杂波能力较弱,不便于进行PD处理.所以一般机载雷达下视不采用低重频

1、摩擦生热.因为摩擦生热,所以消耗机械能；有时,我们还不得不使用散热器,来降温,否则容易损坏器材
2、摩擦损耗.滑动摩擦可以磨损物品表面,使其收到不同程度的破坏,从而造成财产损失,甚至安全也受到威胁

坏处多,地球上海水占了大不分,有一个生态平衡,如果全部海水转化为淡水,那么多海生物咋办,所以还是坏处多

More advantages than disadvantages to the TV, after years of reform and innovation and TV theory of change also occurred with the original CRT to the current developer LTD, or even plasma technology h...

Nowadays,more and more people tend to surf the Internet for information or just for fun.Whatever one may use the Internet for ,things always have its advantages and disadvantages.advantages:1.The Inte...

making friends on the internet can have both positive and negative effects.
on the good sight,we can learn to communicate with all kinds of people from all over the world,learn about their different cultures,and have a lot of fun.
however,it can also have some draw backs.sometimes,or to say,most of the times,we don't even know who we are talking with.so there might be some strangers who are not nice to you.if they arrange a meeting with you and try to harm you in any ways,you have to take care of yourself.there're many reported cases on the website about how people were hurt during those visits.
volunteer work is very important nowadays.schools often require students to do some volunteer work to broaden their minds,especially in high schools and universities.most of the students sweeps and cleans the floor or some companies for free.other go to restaurants and wash the dishes for them.but some of the students can go to labs to learn experiments.those were the really great volunteer works.it can allow you to learn a lot of useful knowledge,so i love those kinds of works very much.

提高了能量的利用率,益处是我们需要的食物就少了.坏处是很多有机物彻底氧化分解后的产物对人体不利.比如人体最多只能把蛋白质氧化分解成尿素,而其中的氮元素若要彻底氧化分解,产物就是强腐蚀性的硝酸.

My pet dog
I have a pet .It has short legs and big ears .Oh!It isn't an elephant!It has short stail and brown hair .It's very cute .It's very friendly ,to .We all like it very much .Every Sunday it plays with me .It's my best friend .It's also very easy to take care of .But sometimes it can be noisy and it sometimes runs around the room .Oh!Yes!It's a dog.