scum n.浮渣,糟粕,浮藻,熔渣,不...national scum 民族败类...scum cock 浮滓旋塞...scum of a nation 民族败类...lime scum 压滤残渣...scum pipe 浮渣导管...scum defect 表面浮松...scum yeast 浮膜酵母...scum hole 出渣孔...scum rubber 泡沫橡胶...scum collector 浮渣收集装置...
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