The most altruistic behavior of all, giving your life to help another, can be explained in cold-blooded evolutionary terms.

最利他的行为，就是为他人牺牲自己，这也可以用毫无人情味的进化论来解释。

耶鲁公开课 - 心理学导论课程节选

And I want to focus particularly on emotions that generate kind or altruistic behavior.

我想特别讲解能让人产生善意,利他主义行为的情感。

耶鲁公开课 - 心理学导论课程节选

This gives rise to some emotion including emotions that could be viewed as moral emotions, like guilt and anger, and again, grounds altruistic behavior in an evolutionary perspective.

这就产生了情绪,包括被视为道德情绪的情绪，例如内疚和愤怒，再一次，这种对利他行为的解释,也是从进化论的角度出发的。

耶鲁公开课 - 心理学导论课程节选