So, you may or may not know this about your TAs, but this is a pretty competitive group of TAs we have this year, and they like to brag about how smart their recitation is, how good questions they're getting in the recitation section.

不知道你们是否知道这与你们的助教有关，但是今年我们的助教们,都非常有才，而且他们都想向别人炫耀一下，自己的讨论课做得有多漂亮，回答的问题有多好。

麻省理工公开课 - 化学原理课程节选

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