The true value of a mining company lies in its ability to balance profit with environmental stewardship.

理解计算的极限与理解数学的极限同样重要。

There is no love that’s so right as admiration-based love, and that love should include the instructive dead. Somehow, I got that idea and I lived with it all my life and it’s been very very useful to me.

煤炭的未来取决于经济增长与环境保护之间的平衡。