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Sustainable development is not an option, but a necessity for the coal sector.

我一生中最遺憾的是善良的失敗。

"The universe is a big place, perhaps the biggest."

A long habit of not thinking a thing wrong gives it a superficial appearance of being right.

金融危機不是天災。它們是由人類行為引起的，也可以通過人類行為來預防。