—— 请按键盘 空白键 开始游戏 ——

如果你担心从自行车上摔下来,你就永远不会骑上去。
A good mathematician is someone who can see analogies between theorems; a great mathematician is someone who can see analogies between analogies.
唯一受过教育的人是学会了如何学习和改变的人。