"So if you get an audience of 10 million people there's a lot of 'don't knows' who watch you and what you say, what you do,in those 90 minutes could be quite decisive."

VOA: standard.2010.04.23

They don't legislate compassion. It's likely that these were considered acts of, who knows, personal conscience, religious conviction, something that was between the individual and society and their God.

也没有给同情立法，这可能是由于人们认为这些行为,只关乎个人良知，宗教信念或者是，介于个人，社会和上帝之间的某一事物。

耶鲁公开课 - 旧约导论课程节选

And he says, I don't, "No one really knows where the Nile River starts."

他说，“我不，没人真的知道尼罗河的源头到底在哪里。”

神话有趣的课 - SpeakingMax英语口语达人

"I don't think at this stage, nobody knows whether BP will be forced to be broken up, whether it might actually end up being so weakened that it falls into the arms of somebody else."

VOA: standard.2010.06.18

The point of this advertisement is to make you feel like you don't have to know what the critic knows in order to read this novel.

这个广告的目的是让你觉得不用具备批评家的知识,也能读懂这部小说。

耶鲁公开课 - 1945年后的美国小说课程节选

Who knows that answer? I don't know it.

谁知道那个时候的英王是谁,反正我不知道

耶鲁公开课 - 聆听音乐课程节选