名词
中文翻译：极光
同义词：
['aurora', 'auroras例句：1. The polar ice caps are the most visible features of the northern hemisphere.（极地冰盖是北半球最显眼的特征。）']
例句：
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1. The polar ice caps are the most visible features of the northern hemisphere.
极地冰盖是北半球最显眼的特征。
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2.Polaris is the brightest star in the northern sky.
北极星是北天空中最亮的星星。
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3. The polar region is home to many unique wildlife species.
极地地区是许多独特野生动物物种的家园。