表示论提供了表达许多数论现象的语言。
War is the continuation of politics by other means.
The future belongs to those who see possibilities before they become obvious.
Habit is habit, and not to be flung out of the window by any man, but coaxed downstairs a step at a time.
爱不是一种感觉,史蒂文斯先生。爱是一个决定。