complex contamination

• 复合污染

complex contamination的用法和样例：

例句

1. Different impact was found on the enzymatic activities for Mn treatment alone and Mn-Cd combined contamination.
   结果表明，锰单一污染与锰镉复合污染对土壤酶活性产生的影响有所不同。
2. Combination contamination of heavy metals is one of important soil contamination types.
   重金属复合污染是主要土壤污染类型之一。