And he defined the average in terms of not the sum divided by two, but he chose the geometric mean.

鲍林定义平均并不是,简单相加在除以二，他选择几何平均。

麻省理工公开课 - 固态化学导论课程节选

First of all, happiness is a positive sum game-- it's not a zero sum game.

首先，快乐是正和游戏-,不是零和游戏。

哈佛公开课 - 幸福课课程节选

Neither it is a negative sum game-- it's not that my happiness takes away from other people's happiness which will be a negative sum game: if I have more, you'll necessarily have less.

也不是负和游戏-,我的快乐不是从别人那里夺来,那将是负和游戏：,我有更多，你一定更少。

哈佛公开课 - 幸福课课程节选