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per·meth·rin AHD[pər-mĕthʹrĭn] D.J.[pəˈmeθrɪn]K.K.[pɚˈmɛθrɪn]n.（名词）- A topical insecticide, C21H 20CL 2O 3, used to treat head lice and nits, scabies, and various species of ticks. 百灭宁：局部杀虫剂，C21H 20CL 2O 3，用于对付头部虱子及其幼虫、疥癣与多种扁虱
- per- per-
- (res)methrin [a pyrethroid] resm- [of unknown origin] (pyr)ethrin(res)methrin [a pyrethroid] resm- [of unknown origin] (pyr)ethrin
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