Yahoo奇摩字典 網頁搜尋

登入
  1. 更多

搜尋結果

  1. Oxford American Dictionary

    biochemical oxygen demand

    • IPA[ˌbīōˌkeməkəl ˈäksəjən diˌmand]

    美式

    • n.
      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