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  1. sea level

    英式

    • n.
      the level of the sea's surface, used in reckoning the height of geographical features such as hills and as a barometric standard
    • noun: sea level, plural noun: sea levels

    • 釋義

    名詞

    • 1. the level of the sea's surface, used in reckoning the height of geographical features such as hills and as a barometric standard it is only 500 feet above sea level