To understand behavior, we must look at its purpose in the context of survival and adaptation.
要理解行为，我们必须从生存和适应的背景中审视其目的。
Sustainable development requires balancing economic benefits with environmental protection.
Women, they have minds, and they have souls, as well as just hearts. And they've got ambition, and they've got talent, as well as just beauty. I'm so sick of people saying that love is just all a woman is fit for.
解释：把利益给出去，就会有实惠返回来；把怨恨给出去，就会有祸害返回来。
作家是这样的人，对他们来说，写作比其他人更困难。