我有必要帮助他们吗? 翻译 提示词（it's.for sb.)

the booming of the world's population makes the rapid development of industry and agriculture essential

These are must-take courses for my study.
must-take作形容词,表示必须上的,不可或缺的.类似的形容词有must-read,表示必读的、不可错过的.

没关系.
方法很多,最常用的方法是用三垂线定理.
从面ACD中的E点向面BCD做垂线,垂足为F,再由F向AC作垂线,垂足为G,则角EGF为二面角的一个平面角,利用三角函数求出这个角的大小即可.
此外还有很多方法.
可以使用空间向量,这种方法降低了思维难度,提高了计算难度.找到合适的坐标系,然后将需要用的点的坐标表示出来.然后寻找两个平面的法向量,注意两个法向量的方向,一个指向二面角内部,一个指向二面角外部.然后求这两个法向量的夹角即可.
空间向量的方法比较万能,只要能找到合适的坐标系,建议熟练使用.它虽然计算烦,但是能将不会做的题做出来.

一般报刊杂志的标题会这么用 中国将在节水领域重大投资

这个取决于你自己,如果你上课精神容易分散,又不太自觉需要外界压力的话就选一对一吧,但是你能控制好自己,自己能找到自己的问题的话,通过平时归纳错题,有不懂的盯着老师问也可以提高,就没必要一对一了.另外我个人认为一对一的话比较耗财耗精力,不到万不得已最好不要选,不妨平时在学校里想想为了把学费发挥到最大效用,盯着老师问到全明白才够本~

It is very necessary to have a walk after supper.

I think its necessary to plant more trees.I study harder than my brother.He thanked me a lot.I'm feeling lot of good now

这两个公式根本没必要去记,考试需要的时候现推都可以,因为证明起来都很简单的.无非就是两角和两角差公式加一加减一减,比如你考虑积化和差：
sin A cos B
这两个东西不同名,肯定是sin(A+B)和sin(A-B)作用的结果,而要得到sin(A)cos(B),cos(A)sin(B)这个就必须在展开时消掉,所以肯定是sin(A+B)和sin(A-B)加起来.加起来后出来两个sinA cosB,除以2不就得到了.不同名的乘一起要化和差最后化出来肯定两个都是sin,同名的话两个肯定都是cos.
和差化积更简单,你只要记住 A = (A+B)/2 + (A-B)/2,B = (A+B)/2 - (A-B)/2足够了.这样随便你怎么出一个和的式子,比如sinA + sinB ,你代入然后展开就是了.需要注意的是如果是sinA + cosB,展开后没法消项的,没法用和差化积.只有同名的两个东西加或者减才能用和差化积.对积化和差没这个限制.

1 search for some useful information
2 interesting so that
回复 丿巅峰丨灬皇朝：不可以,interesting做make的宾补,这里的make是使役动词,使.
make sth +宾补
如果该成as interesting as possible尽可能有有趣地作状,尽可能有趣地,然而剩下make the event就翻译不通顺了

若有缘,亦三载后之事也,现实如是,祝尔福运.
吾彼之离,属迫也,愿其另佳.吾与彼共处现已无望,三载之后必有微偿.若有缘,三载后重叙,对女子言之也.三载后彼仍喜,吾仍纳其.届时吾绝不扰其之幸福也.

Is it really necessary to conduct the experiments on the animals?

1.彼得的妻子一直要求他不要吸烟
Peter's wife always asks him not to smoke.
2.学好汉语对我们来说很有必要
It is necessary for us to learn Chinese well.
3.学生应该每天花至少一个小时进行体育锻炼
Students should do at least one hour exercises each day.
4.我一到杭州就给你打电话
I will call you as soon as I arrive at Hangzhou.
5.严禁酒后驾车
No drunk driving.

It‘s necessary to offer plenty of books to students in that area as soon as possible.
=It’s necessary to offer students plenty of books in that area as soon as possible.=
It’s necessary to provide students in that area with plenty of books as soon as possible.=It’s necessary to provide plenty of books for students in that area as soon as possible.
provide的用法：provide sth for sb提供东西给某人provide sb with sth 提供某人东西
offer的用法：
一、 offer作动词的用法:
1.offer有"(主动)拿给,给予"的意思,相当于give,后可接名词或代词作宾语,也可接双宾语,即offer sb sth =offer sth to sb,如:
The young man offered the old man his own seat on the bus.
那个年轻人在公共汽车上将自己的座位让给了那个老人.
Many people willingly offered their blood.
很多人自愿献血.
No food was offered at the party.
聚会时没有提供食品.
2.offer作"提出、表示"解.如:
Johnson offered a new suggestion.
约翰逊提出了一个新建议.
We all went to offer congratulations.
我们都前去表示祝贺.
The boss in the company came personally to offer us apologies.
那个公司的老板亲自来向我们道歉.
The president offered no comment on the question.
总统对这个问题未作评论.
3.offer后接不定式,表示"主动提出做某事".如:
He offered to drive us to the airport,but we preferred to walk there.他主动提出送我们去机场,但我们宁愿走路去.
She offered to lend me her bike.她提出将自行车借给我.
The boy offered to pay for the desk he had broken.
那男孩主动提出赔偿被他弄坏的桌子.
4.offer还有"出售"、"出价"的意思.
① offer sth for (money) 以多少钱出售某物
He offered this bike for 600 yuan.这辆自行车他要价600元.
The next morning we offered our boat for only 6 dollars.
第二天上午我们仅以6美元出售我们的船.
② offer sb (money) for sth / to buy sth 出价多少购买某物
We offered him 10,000 yuan for his house.我们愿出一万元钱来购买他的房子.
They offered him 3,000 yuan to buy the laptop.
他们愿出3,000元来买他的笔记本电脑.
二、 offer作名词的用法:
1.offer表示愿做某事或给予某物(后接of / to do sth)
Thank you for your kind offer of helping me.= Thank you for your kind offer to help me.谢谢你提供的帮助.`
Practise making offers and requests.练习提供帮助和请求.
2.offer有"出价"的意思.如:
I've had an offer of $8888 for that house.
有人向我出价8888 美元买那房子.
They made me an offer of ten thousand yuan for my motorbike.= They offered me ten thousand yuan for my motorbike.=They offered to buy my motorbike for ten thousand yuan.
他们肯出一万元买我的摩托车.

主动权在你手上
养成这种习惯好
但是咱觉得和让不让同学知道没什么大的关联= =
不过没有必要隐瞒这件事
你可以选择让同学知道这件事
但是没必要让他们去深探你写的日记的内容
好习惯可以分享
隐私问题没必要共享,除非你想与他人分享
这是咱个人的看法

这个表演持续了很长时间.

liss
[blis]
n.
福佑,天赐的福

如果为了高考肯定要学的.一般第二问都是解三角形的问题.

学了当然有好处、不过以我的经验,小学里数学好的,到了高中不一定好
小学的奥数应该是打基础的,关键是初中高中的努力

对,注意开头字母要大写哦!第一个更准确些,第二个运用的“need”的用法,这道题考的应该是关于“necessary”的用法,看看重点考什么

How,long,does,your,mother,clean,the,house. We,have,to,prctise,how,to,say,Eeglish.
记得采纳啊

这是主语太长了,所以我们把他放在后面.前面用it 作形式主语代替后面真正的主语动词不定式.
另外,动词作主语时没有用原型的,要么是不定式,要么是ing

这种情况 不如重新考试 复议分数提高概率极低

Mary said." if necessary,I will bring the camera tomorrow."
Tony took your English book by mistake.
He got his finger a cut when cutting potatoes.
I had been busy making cakes all day yesterday.
I saw a kind of 100yuan note on the ground.
A group of boys about 5 years of age are/ were at play.

I think it necessary to modify the regulation by the development department after reading the reply by development.
To adapt the new regulation,we must modify the statements effected.
We need to do some tests first to make sure the scheme is feasible and won't cause other problem.This test will last about 2 days.
I'll estimate the time to modify the effected statements after testing the final scheme.

如果只是单纯的为了应付考试,大可不必,没必要为了那么几分那么拼,平时慢慢积累就好~
如果你是有很有兴趣,很喜欢的话~那就背吧
不过,要是我的话,我绝对没办法很高兴的去背.

hold on to do
hold on doing
hold on 还有打电话时请别人等一下的意思

More and more middle school students are going to all kinds of training classes or having family tutors at the weekend . There are two different viewpoints on it.
越来越多的中学生利用周末上各种各样的培训班或请家教。对于这一现象，存在俩种不同观点。
Some people think that it is necessary.Firstly, with the help of the tutors, they can learn better. Secondly, this is a good opportunity for students to interact with tutors. Thirdly, students can make up the knowledge that they did not understand in the normal class.
有人认为有必要：首先，有老师辅导比自己学好；其次，这是一个学生与老师互动的好机会。第三，学生可以弥补上课没听懂的只是。
However, other people insist that it is not necessary. For one thing, students will not listen carefully in their normal classes if they can get the same knowledge in training classes. For another thing, most senior students haven’t enough time to rest.
另一些人认为没有必要：一来，如果培训班和普通课上所讲的知识一样，这容易让学生形成上课不专心的习惯；另外一方面，这会导致学生没有足够的休息时间。

In my opinion, a training class or family teacher is not necessary. We can study well at school if we work hard.
我认为，家教或培训班都是没有必要的。只要我们努力学习，我们就可以取得成绩。

这样翻译好像更接近中文意思：
It is necessary to do exerices to keep healthy.

有必要.因为孔子虽然听说过,但并没有亲眼见过,验证一下才能够确认.
答“没有必要”,只要言之成理,也可以.例如：没有必要.因为孔子原本就听说过,而且当场又得到守庙者的证实,没有必要再去麻烦.

B

没必要,看不懂也要每天坚持做阅读理解,只要能找出答案就可以了
当年我考专八的时候词汇量基本还在专四的水平上,最后发现不管词汇量大小,主要是答题的效率问题,把握时间看个大概能保证你有时间把卷子全做完!

My idea is that we should do them a favor when they are in difficulty.
It is necessory that our department should build another computer center.
The old lady hope that she should be still alive when her grandson enters the college.
希望能帮到你!

解题思路：（1）对比试验是科学探究常用的一种方法；
（2）白磷燃烧能生成五氧化二磷；
（3）铁与水和氧气同时接触时容易生锈，根据生锈的条件可以选择防止生锈的方法．

（1）在两支试管中分别加入相同质量分数、相同量的过氧化氢溶液，向其中一支试管中加入二氧化锰，观察发现加入二氧化锰的试管中产生气泡的速率明显快于不加二氧化锰的试管中产生气泡的速率，通过对比可知，二氧化锰...

点评：
本题考点： 燃烧与燃烧的条件；金属锈蚀的条件及其防护．

考点点评： 铁在潮湿的空气中易生锈，实际上是铁与空气中的氧气、水蒸气等发生化学反应的过程，只要破坏铁制品锈蚀的条件，就能防锈．

1.It's necessary for us to stop children from spending
(答案不唯一)

范文：
Dear editor,
I’m writing to tell you about the discussion we carried out on whether it is necessary for middle school students to have mobile phones.
The majority of the students think that students should have mobile phones because they think that it is more convenient for them to keep in touch with their parents and classmates if they have mobile phones. Besides, they can send messages and take pictures with mobile phones. And what’s more, it’s a fashion.
However, most teachers don’t think so. They think that middle school students are not old enough to control themselves. With mobile phones, students may play games, send messages or take photos, which is a waste of time and affects their studies. Besides, it is reported that mobile phones can produce radiation, which does harm to their health.
In my opinion, as middle school students, we should not follow the fashion. Instead, we should put all our heart into our studies.
Yours truly,
Li Hua

答题时应该注意将正反两方面的观点表达清楚。最后在此基础上提出自己的观点。

一、
1 misled 误导
2 Receiving： receiving money作为主语
3 一直在哭应该不止两个空格,暂时想不到
二、
1 get前加个to,tell sb. to do sth.
2 删去to,let sb. do sth.
3 practices改成practice,make sb. do sth.,应该用动词原形
三、
1. You must ask him to follow the rules.
2. because of traffic jam
3. suggestions that are
四、
1 towel毛巾
2 truth
3 His handwriting is so poor. For instance, look at this word.
4 Is it true that he has already left London?
5 This girl is saving money, so that she can buy a present for her mother on Mother's Day.

不要想一口吃一个胖子…这样只会消磨你学英语的兴趣…如果你是初学者…可以试着学习新概念…从一开始…只要买书…听力可以在网上下到…百度一搜全是…然后学的时候记得…要把每篇的单词和语法弄懂…弄通…然后可以试着和听力原文一起读课文…任何事情都要坚持…不要学了两篇就觉得自己可以了…等你英语词汇量达到三千的时候…你才有资格翻译一些简单的文章…这是个比较辛苦的道路…一定要坚持下去…

I can write to you everyday if necessary.

控制音量 一般是 control the volumn或者volumn control
你一定要4个空的话,那就是 turn up/down the volumn
如果有必要的话 if necessary

孩子粗心是再所难免的事情,其实只要他基础知识掌握好了,也就没有必要请家教,其实锻炼孩子的自学能力还好一点!家长当然要正确引导,关心!

上下同除n^2
=lim(n->无穷)[(3+1/n)/(2-1/n^2)]=3/2
把书上的习题都做完,做熟练.总结总结就可.不用再买题来做

I think it is necessary to improve our spoken English before the 2008 Olympic Games.

1.-a=4,a=-4 m 2=5,m=3 2.必有二人相同,共有四各情况,(^指前数的多少次方) -3ab^4 -3a^2b^3 -3a^3b^2 -3a^4b 3.-a/2=-5,a=10 /n-3/=10,n-3=正负10 n=13或-7 4.6-2a=0,a=3 (因为是二次三项式,即第一项的三次方不存在,也就是说其系数为0) 5.2k=0,k=0 k-1=0-1=-1 6.a 2=6,a=4 b (5-a) 1=6,b=0 7.2 (n-1)=5,n=4 a 1≠0,a≠-1.

21.There is a need for schools to change their teachin methods from incaulcation of knowledge to the developing of ability.
22.Looking back the years they passed together, they realized that they had a hppy marriage.
23.No sooner had we left the village than it began to rain.
27.I know nothing about this accident except those in the newspapers.
今天没时间,先做这几个.

诗。

It's necessary to read English for a while every morning.

For us,it is necessary to communicate with our friends.
对于我们来说与朋友交流很有必要

He finds it necessary to study English.

别枉费美丽
擦去灰尘放手吧
听听别人在说什么
别人在说什么
现在别企图逃避了
为什么还要苦苦坚持?
你的坚持不会有结果
我不明白你为何要这么做
因为你的光芒开始陨落
别由着他去,你值得更多
别在他身上枉费美丽
别在苦痛中枉费美丽
当难以承受时不要放弃
别在生活里枉费美丽
很快你便能再次高飞
无论所得为何,你会明白
别枉费你的美丽
嘿
坐定来个深呼吸
瞧瞧我们何其幸运
瞧瞧我们何其幸运
这就是我们的生活
你必须心从所欲
你知道我总在不远处
挣脱你眼里的痛苦
我看到你在掩饰什么
但现在一切还不晚
因为我知道你能挽回
别怕,你能解决的
听我说
别在他身上枉费美丽
别在苦痛中枉费美丽
当难以承受时不要放弃
别在生活里枉费美丽
很快你便能再次高飞
无论所得为何,你会明白
别枉费你的美丽
当你需要人提醒时
记住,你很美,这么美
每一次酸楚,你都隐藏起来
因为你如此美丽
你很美
别在他身上枉费美丽
别在苦痛中枉费美丽
当难以承受时不要放弃
别在生活里枉费美丽
很快你便能再次高飞
无论所得为何,你会明白
别枉费你的美丽
希望可以帮到您!