Plants naturally take in carbon dioxide they need for photosynthesis, the process of changing light energy to chemical energy.

VOA: special.2010.01.26

I've decided that I need to be able, in my program, to swap the value of two variables. All right.

我觉定在我的程序中，我可以，交换两个变量值，好的。

哈佛公开课 - 计算机科学课程节选

because the Earth is in need of people becoming more aware of what it needs.

因为地球需要人们的关心。

有很多活动 - SpeakingMax英语口语达人

In general,dead or living parts of plants need to be removed to improve the shape or growth of the plant.

VOA: special.2009.07.14

If I know about the states involved, I just need to know what the volume was in each of them.

我们并不需要知道一条特定过程的路径，如果我们知道所涉及的态,我仅仅需要知道这些态的体积。

麻省理工公开课 - 热力学与动力学课程节选

Drugs that need a doctor's prescription became a bigger part of the debate over health care costs in two thousand three.

VOA: special.2009.08.14

And the third fact that we need to keep in mind is that spins remain parallel prior to adding a second electron in any of the orbitals.

第三个事实是我们需要记住在,每个轨道加入第二个电子之前,自旋保持平行。

麻省理工公开课 - 化学原理课程节选

If we do not get enough of the vitamins we need in our food,we are at risk of developing a number of diseases.

VOA: special.2009.04.21

As youngsters come along, they need a period of adjustation while their control in the environment grows up.

如果是青少年，他们会需要一段适应期,以逐渐掌控所处的环境。

麻省理工公开课 - 媒体、教育、市场课程节选

They say levels of a protein called Shh need to remain largely unchanged in a developing fetus for the palate to develop correctly.

VOA: special.2009.12.22

We need to throw in an extra clause to deal with branching, splitting cases,of the sort that I've just been talking about.

我们需要加一个额外条件，来处理我们上述的分歧案例。

耶鲁公开课 - 死亡课程节选

The hunger for news of the Civil War in the eighteen sixties increased the need for reporters.

VOA: special.2009.04.20

If we're focused on the work of art in and of itself, on the poem, we obviously in thinking about what it means need to come to terms with three kinds of evidence."

将注意力放在艺术作品本身或者说诗本身上，很显然，如果我们想考虑它所表达的意思的话,我们必须对三种证据作出让步“

耶鲁公开课 - 文学理论导论课程节选

But a new study from the University of Aberdeen in Scotland found no need to delay.

VOA: special.2010.08.11

In binary search-- ah, there's that wonderful phrase, this is called a version of binary search just like you saw bin-- or bi-section methods, - when we were doing numerical things- in binary search, I need to keep track of the starting point and the ending point of the list I'm looking at.

就是当我们处理数字的时候，所称的二分检索，在二分法搜索中,我需要记录区间的开始点和尾点，初始化的时候就是-,问题输入的开始点和尾点，当我开始做测试的时候,我想要做的就是去取中值点。

麻省理工公开课 - 计算机科学及编程导论课程节选

Brian O'Connor of the Family Violence Prevention Fund says young men need guidelines in how to treat young women -- in person or online.

VOA: special.2010.07.15

So, it doesn't need to bind to a receptor on the surface of the cell in order to work because the molecule can actually enter the cell directly.

所以无需与细胞表面受体相结合来起效,因为这些分子能直接进入细胞

耶鲁公开课 - 生物医学工程探索课程节选

To do so,a teacher would need to have eyes in the back of his head.

VOA: special.2009.09.06

The god says to him, "Here's what you need to do. You need to try the spirit of your men, and in that way to inspirit them to carry on until victory.

神对他说,"你需要尝试去鼓舞部下的军心,以此来激励他们坚持下去,直到取得胜利

耶鲁公开课 - 古希腊历史简介课程节选

However,everyone agrees that the city is still in great need of safe and affordable housing.

VOA: special.2010.01.22

I'm a Yale college student, for the purposes of this thought experiment and I live in Pierson because I need to walk a great distance to Chapel Street, to the Starbuck's on Chapel Street.

我是一个耶鲁的学生，出于实验的需要,我住在皮尔逊校园里,我需要走很远的路去新教堂街，去新教堂街上的星巴克店。

耶鲁公开课 - 心理学导论课程节选

He stopped in many places to speak about the need for the League of Nations.

VOA: special.2010.11.18

Whatever the actual origin of these various dietary taboos, they are here embedded in a larger ideological framework concerning the need for the Israelites to separate themselves and to be holy like their god. The dietary laws are connected then with this theme of imitatio dei, of imitation of God.

不管这些饮食禁忌的实际起源是什么，它们都被嵌入一个庞大的思想框架,这个框架考虑到以色列人对区别他们自身,和他们神圣的神的需要，饮食教规,和对上帝的模仿有关系。

耶鲁公开课 - 旧约导论课程节选

Over the past year, groups that care for homeless people have seen an increase in the number of people in need because of the nation's economic crisis.

VOA: special.2009.01.28

That's why all these arguments that we all get into these days about third-party political candidates what do we really need in our political culture, what would break apart the stagnation of our two-party system, if that's what people want or put more directly, will Michael Bloomberg run or not?

这就是我们今天为何面对这些争论,关于第三方党派的候选人,也就是我们的政治文化中究竟需要什么,什么能打破我们两党制停滞不前的现状呢,如果这是人民所愿,或者更直接的说,迈克尔.布隆伯格的做法行得通吗

耶鲁公开课 - 美国内战与重建课程节选

He hoped he had made the country understand one thing: the great need to forget hatred and bitterness in the difficult time of re-building that would follow the war.

VOA: special.2009.12.31

Every teacher in the world on the first day of teacher training need to learn about Marva Collins and Pygmalion effect.

每个教师在第一次接受教师培训时,需要了解Marva，Collins和皮格马利翁效应。

哈佛公开课 - 幸福课课程节选

The huge plantations near Charleston were also in need of rebuilding.

VOA: special.2010.10.04

I know you guys need the rest and interestingly, the best sleepers are in the first couple of rows.

我知道你们需要休息,有意思的是,睡得最香的都坐在前几排

耶鲁公开课 - 基础物理课程节选

Those are the sorts of things we need to break down the statistics the billion people in poverty.

我们需要用这些事例,让人们对几十亿人口,这样一个数据有具体的认识。

普林斯顿公开课 - 人性课程节选