名词
中文翻译：石炭岩
同义词：
['marl', 'limestone']
例句：
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1.The stercorite layer is the oldest part of the rock formation.
石炭岩层是岩石形成中最古老的部分。
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2.The stercorite has been used for centuries as a building material.
石炭岩被用作数百年的建筑材料。
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3.The stercorite was formed by the decomposition of organic matter over millions of years.
石炭岩是由数百万年的有机物质分解形成的。