—— 请按键盘 空白键 开始游戏 ——

可持续性不再是可选项,而是任何想在21世纪蓬勃发展的企业的必需品。
The highest form of ignorance is when you reject something you don't know anything about.
你的心知道方向,跟随它。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.