chemical insecticide

• 化学杀虫剂

chemical insecticide的用法和样例：

例句

1. It is not my contention that chemical insecticides must never be used.
   我不是说人类决不能使用化学杀虫剂。
2. Certain chemical pesticides used to control in- sects have also been well studied.
   对一些特定的用来控制昆虫的化学杀虫剂也研究得比较多。