Mister Weindruch says researchers do not know why reducing calories increases the length of life.

VOA: special.2009.09.01

But, you know why not do something a little special, little different, and they decided instead to use lithium.

但是你懂的，为什么不做的更特殊，更与众不同一些呢？

麻省理工公开课 - 化学原理课程节选

No. Why not? Well, I don't know.

不想。为什么不想？呃，我不知道。

关于美军 - SpeakingMax英语口语达人

They do not know why all these things were found together in one place.

VOA: special.2010.08.03

Usually when you know why it's not working, it's obvious what you have to do to make it work.

通常你明白了出错的原因后，很明显你必须让程序正常运行起来。

麻省理工公开课 - 计算机科学及编程导论课程节选

Scientists do not know why women are more at risk than men.

VOA: special.2009.04.14

So, hedge funds do not advertise, that's why people don't know about them and they have a mysterious -they sound mysterious.

对冲基金公司做不了广告,那也是公众并不了解他们的原因,他们披着一层神秘的面纱...,他们听起来挺神秘的

耶鲁公开课 - 金融市场课程节选

Researchers do not know why happiness increases as people get older.

VOA: special.2010.08.03

And part of it is mystical-- still not understandable-- but we are going to talk about as much as we know-- why it works and how it works.

一部分是很神秘，仍无法理解-,但我们会谈到我们所知的-,信念为什么会起作用及如何起作用。

哈佛公开课 - 幸福课课程节选

Scientists do not know why women are more at risk.

VOA: special.2010.06.15

One of the reasons why the Milgram experiment is so nice to know is that if this ever happens to you, not as an experiment but in real life, it will no longer be new to you.

其中一个原因,为什么我们都应该知道米尔格林姆实验,就是如果这种情况发生在你身上，我不是说实验，而是在现实生活中，你不再对这种情况一无所知。

耶鲁公开课 - 心理学导论课程节选

I do not know why I should fear death.

VOA: special.2010.07.10

Percent daily--no, I don't know why that's not on there actually.

日百分比,我也不知道它为什么没被标出来

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Everybody answered the questions well, intelligently, while he - why, dear me - he did not know anything, so to speak.

VOA: special.2009.01.03

We're trying to understand exactly what changes in your brain when you learn and how those changes persist over time to support memory. And one thing that we know which helps explain why some things are easier to remember than other is that learning is not a unitary process.

我们一直都想查明，学习的时候，大脑到底发生了什么变化，这些变化是如何长时间控制记忆的,我们都知道，学习的过程不是一元化的,这就是为什么有的东西好记，有的东西难记。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Everybody answered the questions well, intelligently,while he C why,dear me C he did not know anything, so to speak.

VOA: special.2010.03.27

So, the radical idea here is you might not know what--why you do what you do and this is something we accept for things like visual perception.

由此引出的一个偏激的观点,你根本不知道自己为何要这么去做,这有点像我们获得视觉感知的过程。

耶鲁公开课 - 心理学导论课程节选

why,when we do not sleep, we do not function well. We just do not know much about sleep at all."

VOA: special.2009.08.26

Doctors do not yet know why this is true.

VOA: special.2010.06.15

But in a recent BBC poll, two-fifths of those questioned said they did not even know why British forces are in Afghanistan.

VOA: standard.2009.11.10