他弄不清楚她是在笑还是在哭。

He couldn't tell if she was laughing or crying.

《牛津词典》

嗨！你们俩在笑什么？

Hi! What are you two laughing about?

youdao

你在笑，不是吗？

You're laughing, aren't you?

youdao

Clearly, Milton is in some way wonderfully speaking through the Lady here. Then we get the Lady again: Shall I go on?Or have I said enough?

确实，弥尔顿在一些方面【笑】,让这位女士替他说话，让我们继续看这位女士：,我应该继续吗？还是我说的够多了？

耶鲁公开课 - 弥尔顿课程节选

During all of these problems for the personality theorist, the body theorist,the fans of the body theorist,is standing there laughing.

人格理论家被这些问题重重困住，肉体理论家和支持者在一旁笑了。

耶鲁公开课 - 死亡课程节选

I noticed that several of you were smiling, in a way, as I read, that suggested you were embarrassed by the performance. Right?

我注意到在我读的时候你们中有人笑了，那表示你们对我的表演感到难堪，对吗？

耶鲁公开课 - 1945年后的美国小说课程节选