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pyrethrin [pai'ri:θrin] n
gen. 除虫菊素〔酯〕
anim.husb. 除虫菊素
chem. 除虫菊酯
pyrethrins n
agric. 除虫菊酯类包括天然的和合成的除虫菊酯类
pest.contr. 除虫菊素
pyrethrin
: 6 phrases in 5 subjects
Agriculture2
Biology1
Pest control1
Pharmacology1
Water resources1

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