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  1. ozone depletion

    • n.
      reduction in the concentration of ozone in the ozone layer
    • noun: ozone depletion

    • 釋義

    名詞

    • 1. reduction in the concentration of ozone in the ozone layer this chemical contributes to ozone depletion
    • 更多解釋
    • n.
      reduction in the concentration of ozone in the ozone layer: this chemical contributes to ozone depletion

    Oxford American Dictionary