- 北極海 — Arctic Ocean (English)
- The smallest and most poorly studied of the oceans on earth. It covers an area of 14 million square km that is divided by three submarine ridges, i.e. the Alpha Ridge, the Lomonosov Ridge, and an extension of the mid-Atlantic ridge. It is also nearly landlocked, covered
year-round by pack ice, and the third of its area is continental shelf.
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