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  1. Oxford American Dictionary

    secondary treatment

    • IPA[ˈsekənˌderē ˈtrētmənt]
    • n.
      the further treatment of sewage effluent by biological methods following sedimentation

    • noun: secondary treatment

    • 釋義

    名詞

    • 1. the further treatment of sewage effluent by biological methods following sedimentation sewage dumped in certain “sensitive” areas of the sea would be given secondary treatment a secondary-treatment stage comprising aerobic biological oxidation and final settlement