scumn.槽粕;渣滓;卑贱之人v.形成浮渣;去除浮渣
scum of societyn.社会渣滓(可鄙的人)
scum of a nation[法] 民族败类
scum removal tank浮渣隔滤池
scum of the earthn.社会渣滓(可鄙的人)
Scum of society.社会败类。
scum box and baffle浮渣室和挡板
scum collecting bin浮渣泡沫收集器槽
scums of mixed juice混合汁浮渣
scummy people dropping litter不讲公德、乱丢杂物的人