可持续发展必须成为煤炭行业每个决策的核心。
Sustainability must be at the core of every decision we make in the coal industry.
“唯一真正无限的是人类的灵魂。”
无论代价如何，安全必须始终放在第一位。
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.