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Mineral12这是各种天然存在、性质一致的物质(如石頭、煤、盐、硫磺，沙、 石油)，或具着和天然矿物一样的化学成分、结晶形态和性质的合成物质。^
FossilFuel5^
Rock7^
    Coal1^
        BrownCoal.^

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