单词 | 变化程度 |
释义 | 〔lignite〕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. Also called brown 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 也作 brown coal〔variation〕The extent or degree to which something varies:变化范围或变化程度:某物变化的范围或程度: |
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