"History is not the past but a map of the past, drawn from a particular point of view, to be useful to the modern traveller."

The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.

诗是一种看世界的方式，而不仅仅是描述它。

如果他们能让你问错问题，他们就不必担心答案了。