眼泪和笑声一样常见，悲伤比快乐更复杂。

Tears are as universal as laughter, and grief is more complex than joy.

youdao

这是露营时间，到处都是聊天的声音和笑声。

It's camping time with a lot of chat and laughter.

youdao

我仍记得校运会的时候，我们的欢呼声和笑声回荡在操场上。

I still remember our school's sports meet when the whole playground rang with our cheers and laughter.

youdao

One of the great discoveries in television and movies was the invention of the laugh track.

电视界和电影界一个很有趣的发现就是,发明了笑声音轨。

耶鲁公开课 - 心理学导论课程节选

So smiles and laughters are contagious.

笑和笑声是传染的。

哈佛公开课 - 幸福课课程节选