And he's not really very happy as opposed to a smile like this, which is a real smile.

他并不是很高兴,相反的是这样的微笑，这是真正的微笑。

耶鲁公开课 - 心理学导论课程节选

So, if you smile at somebody, and you just hate their guts but you want to smile at them, it's--unless you're quite gifted it's difficult to fake a really good, really happy smile.

所以，你对某人微笑，你很讨厌他们，但你要对他们微笑，除非你很有天赋,很难去假笑，伪装真正的微笑。

耶鲁公开课 - 心理学导论课程节选