一如沿海大陆架的加深。
作为首次载人的探险，这次行动的官方目的是“证明北极点是俄罗斯沿海大陆架的延伸”。
The official purpose of this first-ever manned mission was "to prove that the North Pole is an extension of the Russian coastal shelf."
石油主要蕴藏在西北地区，其次为东北、华北地区和东部沿海浅海大陆架。
Petroleum reserves are mainly in northwest and also in northeast China, north China and the continental shelves in east China.
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