解释：脚力不强劲，行程就不会远；刀刃不锋利，割东西就不会深。

Time isn't a line; it's a dimension, like the dimensions of space.

The first step in liquidating a people is to erase its memory. Destroy its books, its culture, its history. Then have somebody write new books, manufacture a new culture, invent a new history. Before long the nation will begin to forget what it is and what it was. The world around it will forget even faster.

In mathematics, you don't understand things. You just get used to them.

采矿业的未来属于那些能够平衡利润与目标的人。

全球能源变革中，中国煤炭行业要有自己的声音和贡献。