I don’t think you should ever feel like you’ve achieved everything. You always have to keep pushing.

Sustainability isn't an option; it's a necessity for the coal sector.

数学中的每个问题都是一个等待解决的谜题，而乐趣就在于解决的过程。

The greatest stories are those that refuse to be tamed.

教育是文明的传递。

一个人知道自己为什么而活，就可以忍受任何一种生活。

解释：河水成冰，不是一日的寒冷所致；积土成为高山，不是须臾的工夫就能完成。