1·In remote regions, the air is pure and the crops are free of poisonous insecticides.
在偏远地区，空气是纯净的，庄稼也不用有毒的杀虫剂。
—— 《柯林斯英汉双解大词典》
2·Farm workers frequently come in contact with these insecticides.
农场工人常常接触这些杀虫剂。
3·In the warm enclosed waters of farm ponds, conditions are very likely to be lethal for fish when insecticides are applied in the vicinity.
当杀虫剂在农场附近池塘的温暖封闭水域使用时，环境很可能对鱼是致命的。
4·Not to be left behind are the disease-spreading pests, about 100 species of which have become immune to a variety of insecticides now in use.
传播疾病的害虫也不甘落后，其中约有100种对目前使用的各种杀虫剂有了免疫力。
5·The results of this study will provide a theoretical basis for further developing trichothecenes as biological herbicides and insecticides.
这项研究的结果将为进一步开发天花粉作为生物除草剂和杀虫剂提供理论依据。