名词
中文翻译：极地弧
同义词：
['polar boundary', 'polar ridge', 'polar plate boundary']
例句：
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1. Thepolar arc is a crucial factor in determining the Earth's climate.
极地弧是决定地球气候的重要因素。
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2.The polar arc plays a significant role in the movement of ocean currents.
极地弧在海洋流动中起着重要作用。
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3.The polar arc is a natural barrier that separates the Arctic and Antarctic regions.
极地弧是一个自然的屏障，将北极和南极地区分隔开来。