If you want to know something like when do you hit the ground, I think it's fairly clear what you have to do.

如果你想知道车子何时落地,我想你该做什么就很明显了

耶鲁公开课 - 基础物理课程节选

Whenever I think about how to build an interesting program, and I hope whenever you think about it, the first thing I think about is, what are the classes I might want to have, what are the types?

无论我何时,去想怎样建立一个有趣的程序，你们每次做这种思考的时候，你们想得第一件事，就是我应该要有什么类呢，它们是什么类型的呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

We will discuss when we get the lecture on sex.

我们将讨论何时做关于性的演讲。

耶鲁公开课 - 心理学导论课程节选