他不想笑，但还是忍不住笑了出来。

He had to laugh despite himself.

《牛津词典》

我禁不住想笑出来。

I felt an irresistible urge to laugh.

《牛津词典》

我忍不住想笑。

I had an uncontrollable urge to laugh.

《牛津词典》

When she does unlock her lips ever so slightly -- when she does unlock her lips, she does so only to anticipate the effect that her speeches would have if she were to unlock them even more.

当她确实如此轻微的开始说话时【笑】,当她张嘴说话时，她只是想要预料,如果她说得更多那么她的演说将会有怎样的影响。

耶鲁公开课 - 弥尔顿课程节选

Talk about a smile is just a way of talking about the body's ability to smile.

用笑作举例只是想说明,肉体具有笑的能力

耶鲁公开课 - 死亡课程节选

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