搜尋結果
biochemical oxygen demand
- IPA[ˌbīōˌkeməkəl ˈäksəjən diˌmand]
美式
- the amount of dissolved oxygen that must be present in water in order for microorganisms to decompose the organic matter in the water, used as a measure of the degree of pollution.
noun: biochemical oxygen demand, plural noun: biochemical oxygen demands