—— 请按键盘 空白键 开始游戏 ——

数学不是一项观赏性运动;要理解它,必须积极参与其中。
Mathematics is not a spectator sport; to understand it, one must engage with it actively.
The act of writing is an act of courage.
Giving up smoking is the easiest thing in the world. I know because I’ve done it thousands of times.
I want to be what I've always wanted to be: dominant.