We laugh when there is incongruity between what we expect and what we actually--what actually happens unless the outcome is frightening."

当我们的期望和现实发生的事实,之间出现不一致时，我们就会笑,除非这种不一致引起恐惧”

耶鲁公开课 - 心理学导论课程节选

You just can't help but smile throughout the entire show and that's the kind of stuff I enjoy watching.

整部剧让你止不住从头笑到尾，我就是喜欢看这种。

喜欢的电视节目 - SpeakingMax英语口语达人

Other primates do it to some extent and then it's interesting when they do it.

其他灵长类动物也在一定程度上有这种特性,但它们的笑很有意思。

耶鲁公开课 - 心理学导论课程节选

The general story of why we can't in general is because there's no surprise, there's no mock aggression, and also there may be a general deadening of self-stimulation.

为什么大部分人不能胳肢自己,是因为它在我们意料之内，没有打闹的侵略性，通常这种引自己笑的念头都会嘎然而止。

耶鲁公开课 - 心理学导论课程节选