such as a distinction between the Pan Am smile, a greeting smile, versus a genuine smile of happiness?

像泛美式微笑，问候式微笑，同真心微笑的区别？

耶鲁公开课 - 心理学导论课程节选

So, you have two sorts of smiles: A real happiness smile a Duchenne smile--called--also known as the Duchenne smile, and then a Pan Am smile, or greeting smile.

所以，有两种微笑：,真正开心的微笑,杜乡式微笑，泛美式微笑，或问候式微笑。

耶鲁公开课 - 心理学导论课程节选

But it was a big, fake smile, the Pan Am smile, a smile to communicate "hello" and but it's as opposed to a smile where the communication is that of genuine happiness.

但那是大大的，虚假的微笑，泛美式微笑，微笑意味着你好,但与微笑截然相反,交流时微笑是真正开心的。

耶鲁公开课 - 心理学导论课程节选

It's sometimes known as a "Pan Am" smile.

即泛美航空公司式的微笑。

耶鲁公开课 - 心理学导论课程节选