专家表示，抗击艾滋病的一个重要部分是政治意愿。

Experts say an important part of fighting AIDS is political will.

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Because positive psychology may mean that we are only focusing on the positive and what works, ignoring all the rest that are not.

因为积极心理学可能表示,我们只聚焦于积极的起作用的部分，忽略其余不起作用的。

哈佛公开课 - 幸福课课程节选

This is the payoff to Player I of choosing Middle against Right, and the line in between, this line here, is the expected payoff to Player I of choosing Middle as a function of the probability that other people choose Right.

这条表示对手选右时参与人选中的收益,两个端点中间的线段部分,表示参与人I选右的预期收益,它是对手选右概率的一个方程

耶鲁公开课 - 博弈论课程节选