propyl bromide

例句：

1. 1. The pesticide propyl bromide is effective against a wide range of insects.
   这种农药丙溴菊酯对多种昆虫都有效。
2. 2. The farmers used to spray propyl bromide on their crops to protect them from pests.
   农民过去常用丙溴菊酯喷洒作物以保护它们免受害虫侵害。
3. 3.The chemical propyl bromide is banned in many countries due to its toxic effects.
   由于其毒性，这种化学物质丙溴菊酯在许多国家被禁止使用。