The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

政策规则优于自由裁量，因为它们消除了时间不一致性问题。

In the end, we only regret the chances we didn't take.

银河系的黑洞是我们研究极端引力的最近实验室。