If it's a true happiness smile, that's actually bodes better for the relationship than a Pan Am, or greeting smile.

如果是一个真正开心的微笑，对这段感情来说是个好兆头,比问候式微笑好的多。

耶鲁公开课 - 心理学导论课程节选

If you try to imagine a smile with no body at all, it can't be done. Why?

如果你要相信一个没有身体的微笑,那是根本做不到的 为什么呢

耶鲁公开课 - 死亡课程节选

That will be--No, not at me, at each other, and that will be the person If you are unable to resolve this dispute yes, you two, please--if you are unable to resolve this dispute, the person to the right of me will be the smiler.

这将是，不，不是我，互相看，将是这个人,如果你不能解决这个争端的话,对，你们俩，请，如果不能解决，我右手边为微笑方。

耶鲁公开课 - 心理学导论课程节选