translation.en: Again, I know this is not as inspiring a notion of compassion as you may have heard in the past, but from a biologist's point of view, this reciprocal altruism kind of compassion is ultimately self-serving too.
translation.zh: 再一次，你知道，这不是像 你过去听到过的同情心的概念那样鼓舞人心， 但是从一个生物学家的角度看，这种互利主义的同情心， 最终还是为自我服务的。