Coal deposits, after all, are petrified peat swamps, and peat is made from decaying plants, which leave their imprints in mud and clay as it hardens into shale stone.
毕竟煤炭矿床本身就是石化的泥炭沼泽，而泥炭的成份是腐烂的植物。当粘土泥浆逐渐硬化成页岩石，腐烂的植物则在上面留下了它们的印记。
They peat and stone construction of a large public housing.
他们用泥炭和石头建造了一个大的公共住宅。
Articles of stone or of other mineral substances (including carbon fibres, articles of carbon fibres and articles of peat), not elsewhere specified or included.
其他品目未列名的石制品及其他矿物制品(包括碳纤维及其制品和泥煤制品)。
Articles of stone or of other mineral substances (including carbon fibres, articles of carbon fibres and articles of peat), not elsewhere specified or included.
其他品目未列名的石制品及其他矿物制品(包括碳纤维及其制品和泥煤制品)。
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