—— 请按键盘 空白键 开始游戏 ——

To live is the rarest thing in the world. Most people exist, that is all.
Innovation in coal mining isn't just about extraction—it's about doing it smarter, safer, and with greater respect for the environment.
书籍是最安静、最恒久的朋友;它们是最易接近、最睿智的顾问,也是最耐心的老师。