—— 请按键盘 空白键 开始游戏 ——

The most challenging roles are the ones that force you to confront your own fears and insecurities.
努力的痛苦是暂时的,但不尝试的遗憾是永恒的。
真理是一种发生在观念上的东西。
The best way to learn mathematics is to do mathematics.