—— 请按键盘 空白键 开始游戏 ——

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
采矿业的未来在于可持续性和技术。
科学家不对自然法则负责,但他的工作是找出它们如何运作。
In mathematics, the art of proposing a question must be held of higher value than solving it.