1、
Both Perseus and Cassiopeia are considered circumpolar from northerly latitudes.
英仙座和仙后座在北半球被称为”拱极星“.
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2、
Both Perseus and Cassiopeia are considered to be circumpolar from northerly latitudes.
英仙星座和仙后座从北纬角度来考虑,被认为是“周极星”.
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3、
The Antarctic Circumpolar Current in this area is wind-induced and is also forced by density field.
该海区的南极绕极流既是风生的,也受到密度场的影响.
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4、
5、
北极的资源、航道以及军事地位都成了各国注目的焦点，环北极各国纷纷依据《联合国海洋法公约》中对海洋权利的概括性规定开始了北极海域的圈地运动。
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