集合是一个允许自己被看作一的多个。

活着就是不断被人性所惊讶。

Stray birds of summer come to my window to sing and fly away. And yellow leaves of autumn, which have no songs,flutter and fall there with a sigh.

In the realm of computational learning, the key is not just to learn, but to learn efficiently.

人总是比他对自己所知道的要多。