translation.en: And the basic idea of kin selection is that, if an animal feels compassion for a close relative, and this compassion leads the animal to help the relative, then, in the end, the compassion actually winds up helping the genes underlying the compassion itself.
translation.zh: 亲缘选择的基本想法是， 如果一个动物对近亲有同情的感觉， 而且这种同情使这个动物去帮助这个亲戚， 最终，这种同情心事实上帮助这个基因 隐含在这个同情心本身。