I certainly didn't understand how they even connected really to chemical reactions, much less other disciplines that I was interested in.

它们这么重要,我并不理解这些分子是什么，我也不知道它们。

麻省理工公开课 - 化学原理课程节选

Now, you think you can make a mistake on your exam, take a look at this up here at tell me what that all is. I have no idea.

你觉得你可以在考试的时候犯错误，看一看这之前写的东西,能告诉我这些是什么，我也不知道。

麻省理工公开课 - 固态化学导论课程节选

I don't know what your major is; I don't know what you are going to do later so I picked the topics that all of us in physics find fascinating.

我不知道你们的专业是什么,我也不知道你们今后从事什么工作,因此,我会选择一些,物理学界公认的有趣的内容

耶鲁公开课 - 基础物理课程节选

I don't know, what would a synonym today be for honor?

我也不知道,现在荣誉的同义词是什么

耶鲁公开课 - 美国内战与重建课程节选

I don't know if the news media are concluding anything, but you do see--we have seen-over recent years, we've seen a lot of suggestions that the turning point is just around the corner and the news media report that.

我不知道媒体是否的出过什么结论，但是我们也看到了，近年来，我们见证了很多改革建议,经济的转折点马上就要来到,媒体是这么报道的。

耶鲁公开课 - 金融市场课程节选