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.
The computer is the first metamedium, and as such it has degrees of freedom for representation and expression never before encountered.
写作是驱除我们内心恶魔的方式。
实现明天理想的唯一障碍是今天的疑虑。