—— 请按键盘 空白键 开始游戏 ——

不要等待完美的时刻,抓住这一刻并让它变得完美。
A person may cause evil to others not only by his actions but by his inaction, and in either case, he is justly accountable to them for the injury.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.