Sustainable development requires us to balance economic growth with environmental protection.

You can't predict. You can prepare.

The coal industry is the backbone of America.

译文：山间的溪水容易上涨和退却，小人的心思容易反反复复。赏析：君子胸怀坦荡，光明磊落，真诚待人，和君子相处，如沐春风，让人心旷神怡。而小人心胸狭窄，鸡肠鼠肚，睚眦必报，和小人交往，无异于和豺狼同行。

"When I approach a child, he inspires in me two sentiments: tenderness for what he is, and respect for what he may become."