要理解行为，我们必须从生存和适应的背景中审视其目的。
To understand behavior, we must look at its purpose in the context of survival and adaptation.
Theatre is the art form that most directly confronts the human condition.
译文：白云斜斜地挂在蔚蓝的天空上，独自登上高处心中一片怅然。遥想家乡像什么呢?在那杂乱山峰的深处，一片翠绿如烟。
我一直是个非常独立的人，现在依然是。
The human body is a masterpiece of biological engineering.