最好的性能改进是从非工作状态到工作状态的转变。

The coal industry must unswervingly follow the path of safe, efficient, clean, and low-carbon development.

解释：兵器既不齐全又不锋利，实质上和没有兵器一样！

Technology in mining isn't about replacing people; it's about empowering them to do better work.

每一种语言都是思想的古老森林。