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  1. Oxford Dictionary

    silent policeman

    • n.
      a traffic-control device in the form of a raised dome set into a road surface at junctions and on corners to control speed and positioning

    • noun: silent policeman, plural noun: silent policemen

    • 釋義

    名詞

    • 1. Australian, New Zealand a traffic-control device in the form of a raised dome set into a road surface at junctions and on corners to control speed and positioning the silent policeman is visible in the middle of Chestnut Street