大西洋洋底在中部形成由北向南的海脊。
The floor of the atlantic ridge in the middle from north to south.
緯度地球赤道北或南的角距離，例如在地圖或地球儀上沿著(zhù)子午線(xiàn)用度數測量
The angular distance north or south of the earth's equator, measured in degrees along a meridian, as on a map or globe.
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