创新不是对一切都说“是”，而是对除最关键功能外的一切说“不”。

Innovation in coal mining isn't just about extraction—it's about doing it smarter, safer, and with less environmental impact.

Do what you love, and the money will follow.

相关系数的可能误差不是可以从第一原理推导出来的东西，而是必须通过经验找到的。