But, you know, any professor who stands before you should say the same thing about his or her subject. If they don't believe that, they shouldn't be teaching.

但是，你知道，所有站在你们面前的老师,可能都会这样介绍他的课程,如果他们不那样相信着，那他们就不应该教那门课了。

麻省理工公开课 - 固态化学导论课程节选

Is the person who is going to be lecturing to you on Tuesday the very same person as the person who is ? standing in front of you lecturing to you now?

那个下星期二,给你们上课的人,会不会和现在站在你们面前,给你们上课的是同一个人？

耶鲁公开课 - 死亡课程节选

What I found when I thought about the Methuselah case was, even though it was me at age 800, the same person as the one who's standing here in front of you now, ?" it didn't really matter. I said, "So what?"

当我思考Methuselah时，我想到的是，虽然八百岁时的我还是我，和现在站在你们面前的人,是同一个人，那已经无关紧张，我说了“那又怎样“

耶鲁公开课 - 死亡课程节选