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n [U] sticky slimy substance produced by the mucous membrane; any similar slimy substance （黏膜分泌的）黏液; 类似黏液的物质: a nose blocked with mucus 黏液堵塞的鼻子 * a trail of mucus left by a snail or slug 蜗牛或蛞蝓留下的黏液痕迹.



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