—— 请按键盘 空白键 开始游戏 ——

Ideas become a material force when they grip the masses.
市场永远在变,唯一不变的是变化本身。
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
数学证明不仅仅是验证,而是一个揭示更深层次真理的故事。