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1.intermediate between peat and bituminous coal.
泥煤和生煤的中间物。收藏指正
2.A soft, brownish-black coal in which the alteration of vegetable matter has proceeded further than in peat but not as far as in bituminous coal.
褐煤一种褐色软质煤，植物性物质的变化程度比泥煤重但比烟煤轻收藏指正
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