—— 请按键盘 空白键 开始游戏 ——

A good mathematician is lazy, but in a constructive way.
一个好的数学家是懒惰的,但是以一种建设性的方式。
The world is full of obvious things which nobody by any chance ever observes.
我欠妇女解放运动什么也没有。
We don't stop playing because we grow old; we grow old because we stop playing.