So, he writes: To the psychologist alone can such questions occur as: Why do we smile when pleased and not scowl?

他这样写到：,对哲学家本身说,会出现这些问题：,为什么开心时我们微笑而非皱眉？

耶鲁公开课 - 心理学导论课程节选

He's also a very likeable person, you know, he's always telling jokes, always smiling,

他也非常讨人喜欢，总会讲笑话，嘴上一直挂着微笑，

有印象的教授 - SpeakingMax英语口语达人

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

This is Angus Trumble, the curator at the British Art Gallery who wrote this wonderful book, A Brief History of the Smile looking at the smile in art.

英国美术馆馆长安格斯,他写了这本奇妙的书，微笑简明史，看艺术中的微笑。

耶鲁公开课 - 心理学导论课程节选