模型是对现实的简化表示，但其价值在于它能够提供不立即显而易见的见解。

Probability theory is nothing but common sense reduced to calculation.

浮动汇率是将国家间相互依存与国内经济政策自主性结合起来的一种手段。

The chemical industry must lead the charge in sustainability—our future depends on it.

The only way to survive is to have a sense of humor.

痛苦是一扇门，通向比它本身更伟大的东西。