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

It's not even a zero-- or rather if I have less, you'll have less- that's a negative sum game-- or a zero sum game-- if I have more, you'll have less- it's a fixed pie.

甚至不是一个零…,或者我更少，你也会更少，那也是负和游戏-,或零和游戏，我更多，你就会更少-,饼就那么大。

哈佛公开课 - 幸福课课程节选

In the language, if I can switch to the language of modern economics, one could say that for Thrasymachus politics is a zero-sum game.

换个领域的词汇，让我用现代经济学的话来说，这可能将，Thrasymachus，式的政治,喻成一场零和游戏。

耶鲁公开课 - 政治哲学导论课程节选