The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.
书是一面镜子:如果一只猿猴看进去,一个使徒不太可能看出去。
宇宙不仅比我们想象的更奇怪,而且比我们能够想象的更奇怪。
I think it's important to stand up for what you believe in.