scab
柯林斯词典
1. N-COUNT A scab is a hard, dry covering that forms over the surface of a wound. 痂
The area can be very painful until scabs form after about ten days. 这个部位会非常疼痛，直到大约十天后结了痂为止。
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scab /skæb/ (scabs)
剑桥词典
scab noun (SKIN COVERING)
[ 可数名词：有复数形式的名词 ]a rough surface made of dried blood that forms over a cut or broken skin while it is healing
（伤口上结的）痂
比较
scar noun
[ 不可数或单数名词：没有复数形式的名词 ]
a plant or animal disease that causes rough areas on the skin
（动物）疥疮，疥癣；（植物）疮痂病，斑点病
scab noun (WORKER)
[ 可数名词：有复数形式的名词 ] informal disapprovingan insulting word for a person who continues working while other people in the organization are on strike
不参加罢工者，工贼 返回 scab