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 can write that down, for me, there is just tremendous sense of creativity and of purpose and meaning.

当你能把它写出来的时候，对我个人来说，会感到这种来自巨大的创造性,目的性，意义性的满足感。

普林斯顿公开课 - 人性课程节选

Can't complain when the whole North East on the other side of the country is getting piled with snow.

当美国东北区白雪皑皑时，在这儿我们也不会抱怨寒冷。

旧金山的天气 - 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

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

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

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

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

So that can be unsettling when we think of this as happening at a certain contemporaneous moment in the history of thought.

如果把这个问题放在思想史的特定时期来想,它可能是难以解决的。

耶鲁公开课 - 文学理论导论课程节选

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

When they do that they can actually engulf the bacteria in a process called phagocytosis and break them down into antigens.

免疫细胞确实是将细菌整个吞进了肚内,这一过程称为吞噬作用,并将细菌分解成小抗原

耶鲁公开课 - 生物医学工程探索课程节选

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

We have to ask, when we say invisible things can't be destroyed, what did we mean by invisible?

我们要问，当我们说无形的东西不可毁灭，我们所说的无形是什么意思？

耶鲁公开课 - 死亡课程节选

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

You adjust the lengths and when it balances, you can sort of tell what this mass is, right?

调整它与支点的距离,然后当它平衡时,你就能得到质量是多少,对吧

耶鲁公开课 - 基础物理课程节选

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

VOA: special.2009.08.11

I think surgery has a lot of parallels that i can draw when i think about leadership.

我认为外科,与领导能力,有着许多的相似之处。

普林斯顿公开课 - 领导能力简介课程节选

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

The question is not so much how we control what happens to us but what do we do when we were faced difficult circumstances, and how we can make spiritual meaning even when difficult things happen to us.

问题不是我们能够掌控多少,而是当我们面对困境,能做些什么，我们怎样体现灵性的意义,即便我们面临困境。

普林斯顿公开课 - 人性课程节选

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

You can smell the bacon when people make it in the morning, the idea of French fries cooked in fat becomes appealing to people.

早上有人在烤肉时,你能闻到香味,富含脂肪的炸薯条对人很有吸引

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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

I don't hear most of it. But there are moments, and they're moments that give me pleasure when I can say, "Oh,yeah. That's what he's doing there."

我也只能听出一小部分，但是有时候，这些时候总是让我激动，我会发现，哦对，这正是作曲家在做的“

耶鲁公开课 - 聆听音乐课程节选

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 when it can become depression.

直到变成抑郁。

哈佛公开课 - 幸福课课程节选

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

VOA: special.2009.05.13

And when Gambetta, whom you can read about,whom I mentioned the other day, when he said,"clericalism,there's the enemy"; and,then you had this sort of campaign against the church, particularly the teaching aspect of the church that's fascinating, which I'll talk about later.

而甘贝塔,你们在书上看过,我之前也提过,他说,教权主义,就是敌人,之后就有一系列反对教会的运动,在反对教义方面尤其精彩,我之后会谈到

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

Now, you can bet when these folks came and consulted the priest and could you please put us down on the list, we want to consult the oracle, the priest said sure have a beer, let's talk about your hometown, what's going on out there.

你能想到,当人们到此请示神谕,会对祭司说,您能把我们的名字写在表里吗,我们想询问神谕,祭司说有啤酒就行,我们先说说你的家乡,那儿发生了什么事

耶鲁公开课 - 古希腊历史简介课程节选

so at the moment when I can't go back to see her, I go to training academies.

所以我不能回去找她的时候，我就去培训学校。

做头发是免费的 - SpeakingMax英语口语达人