国家是理性的行为者，他们总是会按照自己的利益行事。

公司的库存越多，他们就越可能缺乏所需的东西。

"The only thing necessary for the triumph of evil is for good men to do nothing."

The poet is a man who manages to be, in his own lifetime, what all men would like to be after their death.

"Quantum cryptography is not about keeping secrets, it's about knowing when someone is trying to steal them."

历史学家是一个向后看的先知。