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The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.
A wise man proportions his belief to the evidence.
A writer must be willing to be vulnerable.
I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself.
科学的进步不仅依赖于个人的才华,也依赖于集体的努力。