好吧，我知道你们其实不喜欢，计算一个向量场中曲面的通量，所以你们可能不知道我为什么要这么做。

Now, I know that you guys are not necessarily fond of computing flux of vector fieldS for surfaces so maybe you don't really see the point.

youdao

你们可能不知道的是，在中国的这四个反应堆已经在美国13个不同的州挽救或创造了五千个高品质工作。

What you may not know is those four reactors in China have already either saved or created 5,000 high quality jobs here in America and across 13 different states.

youdao

但可能不知道我们是，美国以及欧洲最大的，网上广告市场，因此首先要，告诉你们这是做什么生意的。

But probably didn't know that we are the largest online display advertising marketplace in the United States and in Europe, so I want to first explain to you what this business does.

youdao

And we graduated the same year -- now no one has to say what year that was, even if you know, but we did graduate the same year.

我们同一年毕业的-,当然我不要求你们说出是哪一年，可能有人知道，我们在同一年毕业。

麻省理工公开课 - 化学原理课程节选

So, if you by chance, I know it's very rare, but if by chance you don't get the class you can always follow up later.

如果你们偶然，我知道不太可能，但是如果不小心你们错过了某节课,你们就可以在之后补回来了。

麻省理工公开课 - 固态化学导论课程节选

And for me it's fun because I may not know the novel that you end up picking, and so it is a kind of challenge for me to take a novel that you've chosen and come to grips with it myself It may be one that I know.

我也觉得很好玩,因为我可能不知道你们最后选择的小说，所以对我来说,认真对待你们选的一本书很有挑战性,可能是一本我知道的书。

耶鲁公开课 - 1945年后的美国小说课程节选