If this was a class in which we were going to worry about the general problem of identity across time, this would be a problem we'd have to directly face.

如果我们要讨论的是,贯穿时间的,质的总的问题，我们就需要,直面这个问题。

耶鲁公开课 - 死亡课程节选

And then third year when I taught it which was the last time, I had 850 students in the class, making it at that point the largest course at Harvard.

到了第三年，也就是上一次开课，有850人参加，是当时哈佛人数最多的课程。

哈佛公开课 - 幸福课课程节选