pesticin

例句：

1. 1. The pesticide was effective in controlling the weeds in the garden.
   这种杀虫剂在花园里控制杂草非常有效。
2. 2. The farmers used to use pesticides to protect their crops from insects and diseases.
   农民过去使用杀虫剂来保护他们的作物免受昆虫和疾病的侵害。
3. 3. Pesticides are banned in many countries due to their harmful effects on human health.
   由于对人的健康有害，许多国家禁止使用杀虫剂。