避免麻烦的最大方法之一就是保持简单......系统经常会失控。

我们必须平衡能源供应与环境保护。

To understand the universe, we must first understand ourselves.

"Every book is a door to another world, a world that exists only in the imagination of the reader."

心理过程的功能是调解有机体的需求与环境的要求。