So I think it's very much cultural and related also to religion and Islam,and people,you know, like to believe that we don't have such conducts here.

VOA: standard.2010.07.07

And in these experiments we not only need to learn what has been learnt, but also have to learn what it is that we don't know.

在这些试验里我们不仅,要知道已知的知识，还要知道,我们不知道的内容。

麻省理工公开课 - 媒体、教育、市场课程节选

and it's also like always, almost like a... I don't know, a potpourri

它也经常，几乎是……我不知道怎么说，大概是各种风格的集锦，

街头时尚的精髓 - SpeakingMax英语口语达人

"But,we are also deeply concerned about the things we don't know."

VOA: standard.2010.05.18

You also don't know that they'll give them to the equity owners they won't squander in the future.

你也不知道,他们是否能够兑现股票持有者,它们不会挥霍未来。

耶鲁公开课 - 金融市场课程节选

So why don't you talk about the experience that you had in Israel and also a little bit about what it means to be an Orthodox Jew for those people who don't know maybe the difference between reform and conservative Orthodox.

那何不讲讲你,在以色列的经历,再讲讲,什么是犹太教正统派,向那些可能不知道,改革以及保守正统派的区别的人解释一下。

普林斯顿公开课 - 人性课程节选

Also, I don't know. What have we done?

我不知道。我们都做了什么？

与朋友们的回忆 - SpeakingMax英语口语达人

What makes this enterprise difficult but also riveting is that moral and political philosophy is a story and you don't know where the story will lead.

这一过程会充满挑战又引人入胜,因为道德与政治哲学就好比一个故事,你不知道故事将会如何发展。

耶鲁公开课 - 公正课程节选

Because you see, also motivation and energy-- you don't need research for that, you know that when you are feeling good, you have more motivation, you have more energy-- of course, there is a lot of research to back that up.

因为动力和精力-,不需要研究就能明白，你知道感觉好时，动力和精力更充沛-,当然有很多研究支持这一点。

哈佛公开课 - 幸福课课程节选

It's also--another example, which is relevant, I don't know if any of you voted yesterday.

还有另一个实验,一个相关的实验,昨天有人投过票了吗

耶鲁公开课 - 金融市场课程节选