pesticidal chemical

例句：

1. 1. The pesticide was designed to kill insects without harming the environment.
   这种杀虫剂设计用来杀死昆虫而不损害环境。
2. 2. The farmers used a pesticide to control the weeds in their fields.
   农民们使用一种杀虫剂来控制他们田地里的杂草。
3. 3.The children were warned not to eat the food that had been treated with pesticides.
   孩子们被警告不要吃那些用农药处理过的食物。