名词
中文翻译：冰河时期
同义词：
['glacial', 'epoch']
例句：
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1.The arctoid period is characterized by the formation of ice sheets and glaciers.
冰河时期以形成冰盖和冰川为特征。
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2. During the arctoid period, the Earth's climate was drier and colder.
在冰河时期，地球的气候变得干燥和寒冷。
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3. The arctoid period is a crucial part of our understanding of the Earth's history.
冰河时期是我们理解地球历史的关键部分。