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

So I want to welcome you, I really want to invite you, whenever you've got some reactions to the things that I'm saying, raise your hand, I'll call on you.

所以我欢迎你，我真的邀请你，无论什么时候,你对我所说的有回应，举起你的手，我会叫你的。

耶鲁公开课 - 死亡课程节选

I invite you to try this formula whenever you want.

我建议你们找时间自己算一算

耶鲁公开课 - 基础物理课程节选