This game also has the feature that the more effort the other person, the more the other person does, the more you want to do.

这个博弈也有这个特征,别人越努力你就会越努力

耶鲁公开课 - 博弈论课程节选

There're also clubs like tennis club that you just get together with people to play a little bit, yeah.

学校里也有像网球俱乐部这样的俱乐部，
你只是跟别人一起打球就行了。

伯克利的水上运动 - SpeakingMax英语口语达人

The same with making other people feel good-- complimenting people.

让别人感觉良好也有感染力-,恭维别人。

哈佛公开课 - 幸福课课程节选