Yeah, I know, it's a very sophisticated joke-- it takes a while, but I'm glad you got it.

是的，我知道这是个很深奥的笑话-,需要时间，很高兴你们消化了。

哈佛公开课 - 幸福课课程节选

I think everyone over here seems to know and -- yeah?

我认为这里所有人都好像知道了--是吗？

哈佛公开课 - 计算机科学课程节选