—— 请按键盘 空白键 开始游戏 ——

煤炭仍将是能源结构的一部分,但它必须更清洁、更负责任。
学校必须与生活紧密相连,教育与劳动相结合。
The laws of physics are universal, but our understanding of them is constantly evolving.
The best mining companies don't just follow regulations—they help shape them.