sludge [slʌdʒ]

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附加级

n. 泥泞, 淤泥，泥状雪

There was some sludge at the bottom of the tank. 油箱底有油泥。
Iron and aluminum compounds precipitate as a voluminous sludge. 铁和铝的化合物成为一种体积庞大的蓬松的游渣沉淀下来。