scab
[skæb]
n.
（伤口或疮口上所结的）痂;
（植物的）斑点病;
拒不参加罢工的工人;
破坏罢工者;
例句:
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The Labour Press...cannot descend to scab printing.
来自Socialist Review
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The mill was started up with scab labor.
罢工期间有人坚持上工，使得工厂重新开始运转。
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When you cut yourself , blood clots and forms a scab.
你割破了, 血会凝固、结痂.
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A scab formed on his leg.
他腿上结了个痂.
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A driver who was prepared to scab as a special favour.
来自Times
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It was bleeding and he got a scab because he used it so much.
来自VOA