WORD BY WORD

scum

英/skˈʌm/
美/ˈskəm/
01n.

浮渣, 糟粕, 浮藻, 熔渣, 不起好作用的人

a film of impurities or vegetation that can form on the surface of a liquid

02v.

撇去(浮沫)

remove the scum from

03v.

产生泡沫

remove the scum from