过去从未死去，它甚至没有过去。

It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.

Mining with integrity means leaving a positive legacy for generations to come.

我们有责任利用科学改善生活，而不仅仅是追求利润。