一句话，先是太胆小，明知错的事却不敢不做；后来也还是太胆小，明知对的事却不敢去做。
In mathematics, you don't understand things. You just get used to them.
煤炭开采的创新不仅仅是关于开采，而是更智能、更安全、更尊重环境地开采。
A dreamer is one who can only find his way by moonlight, and his punishment is that he sees the dawn before the rest of the world.
