—— 请按键盘 空白键 开始游戏 ——

If you don’t make mistakes, you’re not working on hard enough problems.
If we find the answer to that, it would be the ultimate triumph of human reason - for then we would know the mind of God.
数学不是观赏性运动,你必须参与其中才能理解。
每个句子都是一次旅程,每个词都是一步。
The essence of mathematics lies in its freedom.