煤炭的真正价值在于我们如何负责任地开采和使用它。

I’d tell men and women in their mid-twenties not to settle for a job or a profession or even a career. Seek a calling. Even if you don’t know what that means, seek it. If you’re following your calling, the fatigue will be easier to bear, the disappointments will be fuel, the highs will be like nothing you’ve ever felt.

我们今天开采的矿物也必须服务于后代的需求。

读书求明理，须让自己满意；与别人谈道理，须令别人佩服。