有机磷类杀虫剂是一类多数属高毒或中等毒类，少数为低毒类的最常用的农用杀虫剂。
今天，人们最关注的一类农药是有机磷杀虫剂，这类杀虫剂可以攻击昆虫神经系统中的分子。
Today, some of the biggest concerns surround a class of pesticides called organophosphates, which are designed to attack molecules in the nervous systems of insects.
新烟碱类杀虫剂是取代高毒有机磷、有机氯类杀虫剂的最佳品种。
The novel nicotinamide insecticide is the optimal variety to replace highly-poisonous organophosphorus and organochlorine insecticides.
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