n.槽粕；渣滓；卑賤之人
v.形成浮渣；去除浮渣
Don't waste your sympathy on scum like that. 對這樣的渣滓你沒必要同情。
In the morning you'll be shipped out with the rest of the scum. 早晨你就會和別的社會渣滓一起運(yùn)走了。
