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
，
的咬人吸血昆虫，其中许
是种动
的外部寄生
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，的咬人吸血昆虫，其中许是种动的外部寄生
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