You know about this but maybe you haven't thought about it at this level of detail, but you know that when you - after you eat, you eat lunch for example.

你们学过胰岛素了,但可能没有在我讲的层面上想过这个问题,但你知道的,吃饭以后,比如说你们吃午饭

耶鲁公开课 - 生物医学工程探索课程节选

Or, if you want, you could say maybe they died, but since they obviously didn't die permanently-- after all they were brought back to life-- how could they possibly tell us what it's like to be permanently dead?

或者,如果你想的话,你可以说或许他们死过,但既然他们没有永久地死去,毕竟他们被救活了,那么他们怎么可能告诉我们,永久死亡是什么样子的呢

耶鲁公开课 - 死亡课程节选