The coal industry has a critical role to play in providing affordable and reliable energy while we transition to a lower-carbon future.

The advantages found in history seem to be of three kinds， as they result either from the mere situation of the climate and country or from the form of government and of the character of the people， or from those finer principles and morals， which may be called the recommendations of philosophy.

可持续性不是一种选择，而是一种必需。

骄傲多半涉及我们对自己的看法，而虚荣则涉及我们希望别人如何看待我们。

研究犯罪者就是研究原始人。