—— 请按键盘 空白键 开始游戏 ——

Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.
真理的概念在任何足够强大以包含算术的形式系统中都是不可定义的。
Life is a never-ending struggle between memory and forgetting.
愚人无视复杂性。实用主义者要忍受它。有些人可以避免。天才将其删除。