prevention chemicals

• 污染

prevention chemicals的用法和样例：

例句

1. Third, we strengthened the prevention and control of environmental pollution.
   三是强化环境污染防治。
2. This happens when rain seeps through garbage, dissolves the metals and chemicals, and carries them into the soil.
   当雨水渗透垃圾，溶解了其中的有害金属和有毒化合物，并把它们带进土壤时，就造成了污染。