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We must mine coal responsibly today so that our children inherit both energy security and a healthy environment.
可持续发展不再是可选项;对于任何负责任的矿业公司来说都是必需品。
用你拥有的,在你所在的地方,做你能做的事。
Where they have burned books, they will end in burning human beings.
The pursuit of mathematical knowledge is a journey that never ends, filled with endless curiosity and wonder.