If you ever tried to walk on a fallen tree log, you understand what the expression means.

VOA: special.2009.06.07

If you're stuck, if you're struggling, if you're not certain about something, please ask. We're not mind readers, we can't tell when you're struggling, other than sort of seeing the expression on your face, we need your help in identifying that.

如果你很差，如果你很纠结，如果你不确定某件事情，请问我们，我们不会读心术，我们没法儿看出来你们很纠结，除非能从你们的面部表情看出来，我们需要你们在这件事儿上的配合。

麻省理工公开课 - 计算机科学及编程导论课程节选

And the terms of the expression change, the parties to the conflict change, the sights change, but the controversy goes on.

也许人们对这种冲突的表述有所改变，利益双方有所改变，文化景观有所改变，但这种争议永远存在。

普林斯顿公开课 - 人性课程节选

Experts on language say the expression was born more than two hundred fifty years ago, when pirates sailed the seas, attacking and robbing trade ships.

VOA: special.2009.05.24

On the other hand, you know, let's be honest here, we also know the expression, " "Misery loves company."

另一方面，老实说，我们都知道有句话说，“祸不单行“

耶鲁公开课 - 死亡课程节选

One of these is the expression, carry a chip on your shoulder.

VOA: special.2010.01.17

Well, well and good, but at the same time, if that's the case, and if there is this extraordinary emphasis on the importance of the expression of genius, you can see what's beginning to happen.

很好，但与此同时，如果过于重视那些,天才作家的表达，你可以看到它所引起的后果。

耶鲁公开课 - 文学理论导论课程节选

Word expert Charles Funk thinks the expression comes from sailors on ships.

VOA: special.2010.05.16

The answer was, find a mathematical expression depending on the number of inputs.

很不错，答案是，找到一个通过输入数字,计算出来的数字表达式。

麻省理工公开课 - 计算机科学及编程导论课程节选

Another "easy" expression is to "go easy on a person".

VOA: special.2009.06.07

When we see that, when we look on the web, we see that expression of both a hope for something better that the web seems to represent for them and we see that sense of furious anxiety about what school classroom actually means to these kids.

当我们认真看那些网站的时候，我们看到了这样一种表达,希望更好的生活,仿佛只有网络能够提供给他们,同时我们还看到了那种狂躁不安,困惑于到底学校的课堂对这些孩子们意味什么。

麻省理工公开课 - 媒体、教育、市场课程节选

The expression is "both feet on the ground.

VOA: special.2009.03.08

I want you to look at this picture, read the little bit about gene - control of gene expression - that's in the book, know that it's a big topic, that we're not going to talk about it except we're going to talk about some examples where control of gene expression can be exploited in order to treat diseases, for example. So I'll see you on Thursday.

所以我希望你能看一下这张图,读一些,教材里基因调控的章节,这是个很大的话题,我们不会进一步深入去探讨,但一些基因调控,用以治疗疾病的例子,我们可能还会在之后的课程中讲到,那我们周四见了

耶鲁公开课 - 生物医学工程探索课程节选

Another financial expression is "run on the bank."

VOA: special.2009.04.26

Scratch The syntax actually looks reminiscent to Scratch, where you have a puzzle piece reminiscent of this shape, but you have to say "if" followed by a space, followed by in parenthesis, the Boolean expression that you want to check -- more on those in a moment.

这个语法看起来使人想起，那里有一个这种形状的程序块，但是你必须说明“if“后面跟着一个空格，跟着一个括号，一个你需要核对的布尔表达式,-还有更多的。

哈佛公开课 - 计算机科学课程节选

He says the syndicate was formed primarily for financial reasons, and he does not expect it to really take on the battle for freedom of expression.

VOA: standard.2010.08.09

Remember Paul Ekman's work on the basic emotions, the universals of emotional expression?

还记得Paul，Ekman对基本情绪的研究，情绪表达的共性吗？

耶鲁公开课 - 心理学导论课程节选

"In the 21st century, expression and assembly are carried out on the Internet so we are going to continue to support those Iranians who wish to circumvent and be able to communicate without being blocked by their own government."

VOA: standard.2010.03.09

When this bound receptor interacts with DNA it could, for example, turn on expression of a target gene.

该受体与DNA结合后能够,启动目标基因的表达

耶鲁公开课 - 生物医学工程探索课程节选