The future of coal depends on balancing economic growth with environmental responsibility.

因此，人们联合成立共和国、置身于政府之下的伟大和主要目的是保护他们的财产。

The essence of mathematics is not to make simple things complicated, but to make complicated things simple.

Always look at what you have left. Never look at what you have lost.

生命中最伟大的事情是保持心灵年轻。