Talk about a smile is just a way of talking about the body's ability to smile.

用笑作举例只是想说明,肉体具有笑的能力

耶鲁公开课 - 死亡课程节选

I got interested in this--well, I got interested in this as a developmental psychologist watching my own children laugh and trying to figure out what it is that made them laugh.

我对笑感兴趣…,身为一个长成心理学家,当我看到我孩子笑时，我就对这个议题感兴趣了,我想弄明白是什么令他们笑的。

耶鲁公开课 - 心理学导论课程节选