双语例句
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Contagious: a human head louse clings to a strand of hair.
感染力：附着在一根头发上的人类头虱。
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The head louse, Pediculus humanus capitis is a tiny insect which lives on the hair. Occasionally, it is also seen in the eyebrows or beard.
头虱是一种寄生于头发上的细小昆虫，有时亦会在眼眉或胡须间出现。
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The human head louse, for instance, evolved from the chimpanzee louse when the ancestors of humans and chimps split apart some five million years ago.
例如，人头虱是500万年前当人类祖先与黑猩猩分化时从黑猩猩身上的虱子进化来的。
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