off-scum [环境] 废渣
fly ash industral off scum 粉煤灰工业废渣
scum blow off valve 浮渣吹泄阀
scum blow-off cock 浮渣吹泄旋塞
scum-off 除浮渣 ; 排浮渣
skim off the scum 撇去浮沫
scum off 撤渣 ; 除浮渣
Blow-off and scum valves 下排污阀 ; 上
Skim the scum off the jam and let it cool.
撇去果酱上的浮沫，让它冷却。
《牛津词典》
Snake has darkness all around him, and his “me first” attitude and ability to fight off (or fit in with) the worst scum make him a futuristic anti-hero.
蛇王的身边布满了黑暗，并且他以那种“我第一”的态度和能力去抗击最坏的人，使得他成为一个超现实的反英雄人物。
youdao
Nothing is more of a turn off than a bathroom where the grout is dirty or moldy or full of soap scum.
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The circular movement of the cooking foods also meant that scum or skin formed neatly in the center, making it easier to skim the residue off the top.
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