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食物安全问题雅思英语作文(雅思真经汇整词汇)

食物安全问题雅思英语作文(雅思真经汇整词汇)evolution: 进化(动词: evolve)insect: 昆虫(insecticide:杀虫剂)bollworm: 一种蛾的幼虫aphid: 蚜虫plague: n.瘟疫;v.折磨,使受灾害

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1. But within a few years cotton pests like bollworm and aphids plague the fields and the farmers saw how rapid insect evolution can be. 〈机经〉

(重点词汇)

pest: 害虫 (pesticide:杀虫剂)

bollworm: 一种蛾的幼虫

aphid: 蚜虫

plague: n.瘟疫;v.折磨,使受灾害

insect: 昆虫(insecticide:杀虫剂)

evolution: 进化(动词: evolve)

Repeated spraying killed off the weaker pests but left ones most resistant to pesticides to multiply. At the same time the pesticides killed off birds beetles spiders and other predators that had once provided natural control of pest insects.

食物安全问题雅思英语作文(雅思真经汇整词汇)(1)

(词汇练习)

spraying :

resistant (名词形式):

pesticide(同替):

predator / prey:

provide(同替):

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