人类能够达到的最高活动是为了理解而学习，因为理解就是自由。
The highest activity a human being can attain is learning for understanding because to understand is to be free.
不经过一年中最寒冷的时候，无法知道松柏是最后凋谢的；不经过艰难的考验，无法知道一个人是不是真正的君子。
Number is the ruler of forms and ideas， and the cause of gods and daemons.
煤炭仍将是重要的能源，但前提是我们与时俱进。
Innovation in mining technology isn't optional—it's our responsibility to the next generation.
Writing is a way of talking without being interrupted.
Challenges are the oven that tests our resilience; how we handle them defines our success.