The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

你可以成为任何你想成为的人。做你自己就好。

我们生产的每一吨骨料都承载着对客户和社区的责任。

我的语言的界限即是我的世界的界限。

Coal companies must fulfill their social responsibilities while pursuing economic benefits.

Between the wish and the thing the world lies waiting.

你知道的越多，你需要的就越少。