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n. 浮渣, 糟粕, 浮藻, 熔渣, 不起好作用的人
vt. 撇去(浮沫)
vi. 产生泡沫

n. a film of impurities or vegetation that can form on the surface of a liquid
v. remove the scum from

复数: scums 过去分词: scummed 现在分词: scumming 过去式: scummed 第三人称单数: scums