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The true cost of coal isn't just in its price, but in how we manage its consequences.
煤炭的真正成本不仅在于价格,还在于我们如何管理其后果。
The brain is a complex system, and we are just beginning to understand how it works.
翻译:君子以节俭为德而避开危难,不可追求荣华而谋取禄位。