The pistons go up and down as a person stands on lever devices treadles and uses a natural walking motion.

VOA: special.2009.08.17

They move from regions of high concentration to regions of low concentration by this natural flow down a concentration gradient.

从高浓度区域,向低浓度区域流动,顺浓度梯度流动

耶鲁公开课 - 生物医学工程探索课程节选

or NYU or Harvard or Yale. I wouldn't turn down a job there.

纽约大学、哈佛大学或耶鲁大学教书。我肯定不会拒绝在这些学校里的工作。

什么事情都是可能的 - SpeakingMax英语口语达人

And he picked up Dan'l and turned him upside down and out came a whole lot of bullets.

VOA: special.2009.08.29

The way he described is when you try to get down a quantum dimensions and you are standing there with your camera, just remember the sun is at your back and your shadow is always in the picture.

这种方法被他描述为,当你试着处理一个量子尺寸时,并且你试着拿着你的相机在那，记住太阳在你的背后,而你的影子总是在照片上。

麻省理工公开课 - 固态化学导论课程节选

Still,in the words of an old American saying, the person who keeps pulling the grapevine shakes down at least a few grapes.

VOA: special.2009.02.22

I want to now move down a little bit and observe how landscape is presented to us.

现在我想往下看一点,观察一下四周场景,是怎样的呈现给我们的。

耶鲁公开课 - 1945年后的美国小说课程节选

Today,we take a virtual walk down a famous street found in almost every land on the planet.

VOA: special.2009.11.27

Movement down a concentration gradient occurs fairly rapidly over short distances like a micron or so, like the size of a bacterium.

顺浓度梯度扩散在一微米左右的短距离内,相当迅速,一微米相当于一个细菌的大小

耶鲁公开课 - 生物医学工程探索课程节选

He learned to get light to go far enough down a glass fiber to pass on signals.

VOA: special.2009.12.08

I shouldn't put down a name of a company because I can't reproduce this diagram for Microsoft.

我不应该用这个公司名,因为我没法重现它的数据

耶鲁公开课 - 金融市场课程节选

They count down the final seconds to midnight as they watch a brightly lit ball slide down a pole on top of a tall building.

VOA: special.2009.12.28

Well no, hang on a second. Just slow down a second, that's a good one.

问得很好,我们一会再来回答

耶鲁公开课 - 博弈论课程节选

The study was finally shut down after an employee told a reporter about the experiment.

VOA: special.2010.07.21

That is a very heavy thing and it will weigh you down after a while.

所以这种盾牌是很沉重的,拿一会儿你们就歇菜了

耶鲁公开课 - 古希腊历史简介课程节选

Looking down at a piece of the famous rock, Cari Corrigan suggested its historic importance.

VOA: special.2010.07.28

Whereas the--if I take the rhythm out of the Ninth Symphony really Beethoven there is just going up and down a scale so it's very conjunct.

无论哪里,如果我将第九交响曲的,节奏单挑出来,你就会发现贝多芬这里,仅仅是一个个升或降的音阶,这是级进的典型例子

耶鲁公开课 - 聆听音乐课程节选

I tore a piece of paper out of my notebook and wrote down a name.

VOA: special.2009.07.18

One character, Biff, could never hold down a job,

其中的一个角色，毕夫，他总是不能保住工作，

喜欢的书 - SpeakingMax英语口语达人

Last week,my sister's car broke down as we were driving to a friend's marriage ceremony.

VOA: special.2011.04.10

Saying, well, the market on average will go up a little bit, or go down a little bit.

导致了股票价格的浮动值不同,基本上股市平均是向上增长的或是向下跌了。

麻省理工公开课 - 计算机科学及编程导论课程节选

It's the story of the three little pigs and the big bad wolf that blew down a house made of straw and one made of sticks.

VOA: special.2009.10.05

And so ease of implementation is actually a very compelling -- metric against which to measure-- -- do you mind toning my voice down a bit-- is a very reasonable measure against which to measure the quality of an algorithm, right.

如此简单的实现实际上是一个很牵强的,度量，与之相对的衡量是-,如果你们不介意，我降低点音量-,是一种用来度量算法质量的,合理的方法。

哈佛公开课 - 计算机科学课程节选

I want to understand the Mexican part. So I sat down and I researched a lot about the stories and the legacy of the Mexican culture.

VOA: special.2010.06.21

So there, you see Hobbes laying down a challenge.

你可以看见霍布斯挑战权威。

耶鲁公开课 - 政治哲学导论课程节选

They include Christianity,same sex love and the excitement of speeding down a road.

VOA: special.2011.05.27

So it might be something like that, a tiny little something that one would set down like a couple of elements.

所以创作的支点可能是类似这些的，很小很小的事情，作者会把它们列出来,就像一系列元素一样。

普林斯顿公开课 - 人性课程节选

We don't want to get the Supreme Court into making fine distinctions about what is better than others, because that will lead us down a slippery slope.

VOA: special.2011.07.04

As long as it's reversible, you know what the efficiency has to be, and in principle, you could break it down into a bunch of steps that you could formulate as isothermal and adiabatic.

只要这个循环过程是可逆的，你们知道效率是多少，从理论上说，可以将总过程,分解成一系列绝热,和等温的小过程。

麻省理工公开课 - 热力学与动力学课程节选

He arrived in the land of Midian, and sat down beside a well.

逃往米甸，并且在一口井边定居。

耶鲁公开课 - 旧约导论课程节选