有一种爱叫做放手，为爱放弃天长地久，我们相守若让你付出所有，让真爱带我走。

One kind of love is called drops, to like giving up for ever and ever, we defend, if lets you pay all, lets like leading me really to walk.

youdao

Externality When I'm figuring out how much effort to contribute to this firm I don't take into account that other half of profits that goes to you.

外部性,当我计算要为公司付出多少时,我没考虑到利润的一半会归你所有

耶鲁公开课 - 博弈论课程节选