pentacid

例句：

1. 1. The pesticide was designed to control the growth of harmful insects.
   这种杀虫剂被设计用来控制有害昆虫的生长。
2. 2. The worker used a pentacid to treat the wound.
   工人使用一种五氯苯来治疗伤口。
3. 3.The pentacid is highly toxic and should only be used under medical supervision.
   五氯苯极其有毒，只能在医疗监督下使用。