difficulty degradable organic pollutants

• 难降解污染物

difficulty degradable organic pollutants的用法和样例：

例句

1. Photocatalytic reduction as a method of advanced oxygenation has been widely researched in treatment of undegradable pollutants.
   光催化氧化作为一种高级氧化技术近年来在难降解污染物的处理方面得到了广泛的研究。