Don’t loan money to a friend unless you are ready to make it a gift.

Overfishing is like maxing out a credit card - the heavy price will come due eventually.

In business, you have to be willing to take risks, but they must be calculated risks.

函数的概念在数学中是基础的，而λ演算试图使这一概念精确化。

The worst evils in history have always been committed by those who truly believed they were combating evil. Beware of combating evil.