The concept of reducibility is central to understanding the relationships between different computational problems.

A Book of Verses underneath the Bough, A Jug of Wine, a Loaf of Bread—and Thou Beside me singing in the Wilderness— Oh, Wilderness were Paradise enow!

性别经济学并不是一个小众主题；它是理解现代经济体的核心。

你可以在某一时间欺骗所有人；也可以在所有时间欺骗某些人；但你不可能在所有时间欺骗所有的人。