For example, lightning can create tubes of glass when it strikes sand that has the right combination of minerals.

VOA: special.2009.09.16

And when you have an optimal substructure and the local solutions overlap, that's when you can bring dynamic programming to bear.

当你得到一个最优子结构,但局部解决方案有重跌时，你就可以引入动态编程,来解决这个问题了。

麻省理工公开课 - 计算机科学及编程导论课程节选

and I think that's something they can experience when they go on exchange to another university.

我觉得这是交换到别的大学的学生可以体验到的。

做交换生来到这里 - SpeakingMax英语口语达人

Mister Sharmarke says piracy can only be prevented when Somalia has a government that can enforce its own laws.

VOA: special.2009.04.25

There's no classical analogy that explains oh, this is what you can kind of picture when you picture a wave function.

可以解释：,哦，这就是，你想象的,波函数的样子啊。

麻省理工公开课 - 化学原理课程节选

Ships no longer in use contain dangerous materials which can be released into the environment when they are taken apart.

VOA: special.2009.04.27

Have we at least found something interesting,necessary, unique to death when we say,Nobody can die my death for me.

我们是否至少找到一些有趣，必要，独特的东西，当我们说“没有人能代替我死亡。

耶鲁公开课 - 死亡课程节选

The leaves make good salads when the plants are young, and the greens can be cooked when the plants are older.

VOA: special.2010.03.02

You can--when you set up a corporation there are different kinds of relationships that people might have with a corporation.

当你建立一家公司时,人与公司之间,就会有千丝万缕的关系

耶鲁公开课 - 金融市场课程节选

When it is cold outside, the president and his family can warm up near one of the White House's twenty-eight fireplaces.

VOA: special.2009.05.08

That was it. We decided.. I mean we are just talking about when you speak privately, you can be so much more open and so much more grave about things.

就是这样，我们决定，我们刚刚还聊到,当你私下聊天，就会变得更加坦诚,更加勇敢。

普林斯顿公开课 - 人性课程节选

It had a long title: "When You Want 'Em,You Can't Get 'Em, When You've Got 'Em,You Don't Want 'Em."

VOA: special.2009.02.08

She can hear when the ambiguity creeps in between the words, and that tells her that she needs to find something out.

当这些含糊的东西，出现在字里行间，她能够听到它们并且感觉自己需要发现些什么。

耶鲁公开课 - 1945年后的美国小说课程节选

Also,you can monkey around when you feel like doing something, but have no firm idea of what to do.

VOA: special.2011.03.13

When estrogen is present it can enter cells in the vicinity and it can bind to receptors that are deep inside cells.

雌激素能够进入到邻近的细胞中,并能够与细胞内部的受体相结合

耶鲁公开课 - 生物医学工程探索课程节选

The American Academy of Pediatrics says some poisons can cause additional damage when they come back up the throat.

VOA: special.2009.08.11

Hardy wants to use really old dialect words, when he can, and there's power in that. And this is a poem composed in 1915.

哈迪在他可以的时候总是想使用真正的古代方言，而在其中是有力量的，这是一首在1915年作的诗。

耶鲁公开课 - 现代诗歌课程节选

People can also cause a blockage when they try to clean out their ears, but only push the wax deeper inside.

VOA: special.2010.03.31

That is to say, when one can scarcely say the word "author" without thinking "authority," and one can definitely never say the word "authority" without thinking about the police.

意思就是说，当一个人说到“作者“,而想不到“权威“，或者一个人,在没想到警察的时候绝对不会想起“权威“这个字眼。

耶鲁公开课 - 文学理论导论课程节选

Progress on a work plan for securing nuclear materials can be discussed when South Korea holds the next summit in two years.

VOA: special.2010.04.17

We can't stand against them anymore and when you start running, the only thing the guys who are left up front can do is run.

我们打不过他们了,而你开始逃跑,留在前面的人唯一能做的也是逃跑

耶鲁公开课 - 古希腊历史简介课程节选

There was nothing I could do. When you have this kind of a problem, you can only take care of your body.

VOA: special.2010.08.09

Say it when you wake. Can anybody tell me what it means?

每天醒来也要读，谁知道它的意思吗？

耶鲁公开课 - 新约课程节选

And so when you can find an artifact that very comfortably dates the site to the appropriate period, that's exciting for an archeologist."

VOA: special.2011.07.26

And that's our obligation to send them to war only when we have to, and only when we know they can actually achieve their mission is a key difference between what I advocate and what the neo-cons advocate.

我们有义务,在必须的时候，送他们上战场，我们必须确保,他们一旦奔赴战场就能完成使命,这是重大的不同,我和新型保守派主张的不同之处主要在此。

普林斯顿公开课 - 国际座谈会课程节选

It can be treated when found early, but once it grows the chances of survival drop sharply.

VOA: special.2009.05.13

But,it was the longest republic and it lasts from, depending on when you start it-- and you can read about that-- whether you start it in 1875 or 1877, or when there really was a Republic, the early '80s-- it lasts until May,June 1940.

但这是一个持续时间最长的共和国,它持续了,取决于你如何判定它的开始时间,你可以在书上读到,从1875年还是1877年,还是从真正形成共和国,也就是从八十年代初开始,它持续到1940年六月

耶鲁公开课 - 1871年后的法国课程节选

She says she wants the students to know that even when facing hard times, they can succeed.

VOA: special.2009.01.28

because that sounds like fun. Something, you know, try and join that when I can.

因为听起来很有趣。我想试一试，有空的时候我就参加。

社团小组信息 - SpeakingMax英语口语达人

Something I can measure and I can tabulate, and when I turn my dT knob here I know what's going to happen to the enthalpy.

----热容，我们可以用实验，测出热容并成表,当我知道这里的变量。

麻省理工公开课 - 热力学与动力学课程节选