The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

可持续发展不是选择，而是煤炭行业的必然要求。

The only person you should try to be better than is the person you were yesterday.

质量从来不是偶然的，它总是智慧努力的结果。

Innovation is the specific instrument of entrepreneurship. The act that endows resources with a new capacity to create wealth.