—— 请按键盘 空白键 开始游戏 ——

The world needs energy, but it needs responsible energy more than ever.
Advice like these are not laws. They are like hats. If one doesn’t fit, try another.
【译文】 孔子说:“道听途说就是道德败坏。”
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.