笑是一个严肃的科学课题，是一个研究者们仍然正在试图弄明白的问题。

Laughter is a serious scientific subject, one that researchers are still trying to figure out.

youdao

他听到她咯咯地笑，穿上她的睡袍，踮着脚走到厨房，弄响面包机、咖啡机还有窗帘。

He listens as she giggles, slips on her robe, tiptoes into the kitchen, and rattles the toaster, the coffee maker, and the curtains.

youdao

I got interested in this--well, I got interested in this as a developmental psychologist watching my own children laugh and trying to figure out what it is that made them laugh.

我对笑感兴趣…,身为一个长成心理学家,当我看到我孩子笑时，我就对这个议题感兴趣了,我想弄明白是什么令他们笑的。

耶鲁公开课 - 心理学导论课程节选