The coal industry has been the backbone of America's energy independence for generations.

对我们未来最大的威胁是冷漠。

预测未来的最好方法就是创造它。

The only person who cannot be helped is that individual who blames others.

"The only way to get rid of a temptation is to yield to it."

办一件事都不能善始善终，就不要做很多事。