Every ton of coal we extract must create maximum value with minimum environmental impact.

数学中最令人兴奋的时刻是当你发现一些隐藏在显而易见之处的东西。

The future of farming lies in our ability to balance productivity with environmental responsibility.

"The only thing that is truly boundless is the human spirit."

世界因你的榜样而改变，而不是因你的意见。