煤炭不仅仅是一种商品，它是对美国未来的承诺。

你最不满意的客户是你最大的学习来源。

Dictatorship and authentic literature are incompatible. The writer is the natural enemy of dictatorship.

Be kind, for everyone is fighting a hard battle. And if you really wanna see what people are… all you have to do… is look.

数学家的工作是在别人看到混乱的地方发现模式。

Mining enterprises should focus on comprehensive resource utilization and improve resource efficiency.