"My feeling on climate change is, I don't know that what we do as Americans or as people is what's causing most of what's happening.

VOA: standard.2009.12.12

It's best if you don't know what that is or even if you do mistakenly attribute it, misattribute it, to physical attraction, romance, intimacy, passion and commitment, it's love.

最好是如果你不知道是什么,甚至如果你错误认定，以为是生理吸引力，浪漫，亲密，激情和承诺，那是爱情。

耶鲁公开课 - 心理学导论课程节选

Or perhaps, you could be trying to explain that you don't know whether you can do something or not by a certain date.

又或者，你正在试图解释你没法确定你是否能在一个指定日期前做完某件事。

I don't know 课堂 - SpeakingMax英语口语达人

Some of you are probably going to be doctors and you don't know why I'm going to do special relativity or quantum mechanics, but you don't know when it will come in handy.

你们中的有些人可能会成为医生,但你们现在不能理解,我为什么要讲相对论和量子力学,但是说不定什么时候,你就用上了呢

耶鲁公开课 - 基础物理课程节选

My favorite moral dilemma is as I'm walking down the street and I see somebody I sort of know, do I avoid eye so we don't have a conversation or do I say, "Hey. How are you doing?"

我最喜欢的道德困境是,当我走在大街上时,我看到一个不是很熟的人，我要转移视线，免得要跟他交谈吗,还是我说”你好吗？“

耶鲁公开课 - 心理学导论课程节选

So let me just return once again to the way in which sign systems are intelligible because lots of- there are going to be lots of moments in a course like this in which what we seem to be saying is that, "Oh, we can't know anything," or "We don't know what we know," or "How do we know what we know?"

现在让我们回到,怎样理解符号系统的话题上-,这个学期你们会有很多时候觉得,天哪，我们什么也认识不了“,或者，哎，我们其实并不了解我们以为理解的事“

耶鲁公开课 - 文学理论导论课程节选

In any event, this is some interesting research opportunity, so again, no obligation, you don't have to do this, I won't even know if you are or not, but I just thought I would present these in the case you might find them interesting things to do.

不管怎样,这都是些不错的研究机会,不过不是强制的,我甚至都不知道你们参加与否,不过我还是会把这些放在这里,这样大家可能会找到一些有趣的事情去做

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选