Now the problem was how to get the astronauts back to Earth as quickly and safely as possible.

VOA: special.2009.07.22

So let's take our one model that we keep going back to Equation of state, and just see how it works.

我们回到经常使用的理想气体模型,或者说状态方程。

麻省理工公开课 - 热力学与动力学课程节选

How many people vote for that this is a reversible process? I've got one vote back there two votes, three votes, four votes. Anybody else?

有多少人认为,这是一个可逆过程？有一个，两个，三个,四个，还有别的人吗？

麻省理工公开课 - 热力学与动力学课程节选

The story of how space scientists were able to recover the material and bring it back to Earth is just as exciting.

VOA: special.2009.09.30

All right. Let's step back from this discussion and notice how many objections have we heard to what they did?

我们先暂停讨论,回想下对他们行为，有多少反对意见？

耶鲁公开课 - 公正课程节选

Then when Smiley's dog come to make a grab the other dog's back legs, he saw in a minute how there was a problem.

VOA: special.2009.08.29

We were going to have a clicker slide on how many bounced back but it looks like we're having a little technical difficulty with that.

发生背散射，球被弹回来了的,同学请你们站起来,让我算算。

麻省理工公开课 - 化学原理课程节选

"When I look back on my childhood I wonder how I survived at all.

VOA: special.2009.12.27

If you go back to this particular graphic, the interesting thing is how have humans changed and what are they like now.

如果你回过头来看这张图,思考人类是如何演化的,现在又成为什么样

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The former astronaut says he would like to go back to the moon to see how the American flag he and Neal Armstrong planted there is doing.

VOA: special.2011.07.18

Historically, money lenders of one sort or another go back -who knows how far back -thousands of years.

从历史上讲,放债人的存在可以追溯到,谁知道多久以前,数千年前吧

耶鲁公开课 - 金融市场课程节选

"I came back from that really shaken up. I started to think about how the oceans are having a hard time.

VOA: standard.2010.08.04

that we understand how markets work better, that we... ? or that we stand back and let them?

或者说我们了解市场如何才能更好地运作。,而应当放手让市场自我调节？

斯坦福公开课 - 经济学课程节选

Back in 2005, when Frank Ruhli was trying to figure out how ancient Egypt's famous boy pharaoh,King Tut,died, he used CT scans.

VOA: standard.2010.05.05

The sense of going back and forth, no one of us on top, not correspondent in a vertical way, how things going down there.

这种来来回回的感觉，没有人是在高处，也没人在低处。

普林斯顿公开课 - 人性课程节选

"Right away,I was brought back to reality, how things can be difficult for me as well."

VOA: standard.2010.07.22

The first step is divide them in half. All right? I'm not sure how to mark it here, remember I need to come back there. I'm not yet done. What do I do?

我不能确定如何,在这里进行标记,记住我会回这里进行讲解,我还没做完呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

"Today the nature of the game showed how strong we were at the back, and that was a very good thing for the team.

VOA: standard.2009.10.17

And we'll look back maybe and see how that difficult text would've looked in its original context.

我们会倒回去看看这一不同文本,在其原背景下是什么样的。

耶鲁公开课 - 新约课程节选

Ruhli,who is a medical doctor as well as a paleo-pathologist, says looking back can help scientists look forward, by revealing how the disease evolved over time.

VOA: standard.2010.05.05

But, how do you explain some of these going way, way back.

但是你如何解释,其中的一些会回来。

麻省理工公开课 - 固态化学导论课程节选

And like millions of people across Spain, she will be back again in the morning looking for a new job and wondering how the situation can improve.

VOA: standard.2010.06.24

So then you have Xenophon writing his Anabasis, The March Back, telling the story of how those 1,500-- those 10,000 Greeks rather got back home.

所以当色诺芬书写《远征记》时,讲述这一千五百,哦,是一万希腊人凯旋而归的故事

耶鲁公开课 - 古希腊历史简介课程节选

Leaders are also discussing when and how they will cut back efforts to stimulate their economies, and expanding the role of emerging nations in economic decisions affecting the world.

VOA: standard.2009.09.25

I tie a spring to my back and I anchor it to the wall and see how much the spring stretches before the two forces balance.

我把弹簧一端系在背后,另一端固定在墙上,观察两个力平衡时弹簧的伸长量

耶鲁公开课 - 基础物理课程节选

A senior State Department official said the United States is in contact with other participants in the six-party process on how to get North Korea back to the negotiating table.

VOA: standard.2009.04.15

But yet when you look back from the nineteenth century, these factors do count in explaining how countries turn out to be the way they are.

不过当你从十九世纪开始回顾历史,这些因素的确能解释,国家是如何转变成现在这样的

耶鲁公开课 - 欧洲文明课程节选

"But I think it's another thing when you retire and you sit back and you see how many perfect games have been thrown in the history and your name's in there.

VOA: standard.2009.07.24

We didn't have a clue back then how to explain life in material terms.

在那个年代,我们还不知道如何从物质的角度去解释生命

耶鲁公开课 - 死亡课程节选

How we could take cells that are differentiated to some extent and make them de-differentiate, to go back in the process of differentiation so that they gain more potential.

我们如何把一些已经分化到,一定程度的细胞去分化,使其回到分化之前,重新获得更多的潜能

耶鲁公开课 - 生物医学工程探索课程节选