You must learn not to laugh, and if you must laugh then see to it that you don't cackle like the neighbor's hen.

你必须学会不要笑。如果你一定要笑的话，确保你不要像邻居家的母鸡一样尖声笑个不停。

youdao

Your life only lasts for a few decades, so be sure that you don't leave any regrets. Laugh or cry as you like, and it‘s meaningless to oppress yourself.

人生短短几十年，不要给自己留下了什么遗憾，想笑就笑，想哭就哭，该爱的时候就去爱，无谓压抑自己。

youdao

If one day you feel like crying...... call me, I don't promise that I'll make you laugh...... But I can cry with you.

如果有一天你想哭……给我打电话，我无法许诺我能让你笑……但我可以陪你一起哭。

youdao

When you're in a group doing something terribly aggressive and you are not--you don't feel like you're at risk you might laugh and laughter is a signal to other members of your group as a signal of solidarity and what you're doing together.

当你在群体在做具有强烈攻击性的行为时,你不会觉得自己有危险,你会笑,你笑是向其他群体成员传达一个信号,你们团结一致，共同进退。

耶鲁公开课 - 心理学导论课程节选