Any of numerous small,flat-bodied,wingless biting or sucking insects of the orders Mallophaga or Anoplura,many of which are external parasites on various animals,including human beings.

 
  • 虱,寄生虫无数小的,身体扁平,没翼的咬人吸血昆虫,其中许多是多种动物的外部寄生物。
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