名词
中文翻译：Unknown
同义词：
['glacial', 'ice age例句：1. The pluvian period is characterized by the formation of glaciers and ice sheets.（冰河时期以冰川和冰盖的形成为特征。）']
例句：
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1. The pluvian period is characterized by the formation of glaciers and ice sheets.
冰河时期以冰川和冰盖的形成为特征。
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2. The pluvian period was a time of great environmental change.
冰河时期是环境发生巨大变化的时期。
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3. The pluvian period has left many fossils that can be studied to understand Earth's history.
冰河时期留下了许多化石，可以研究以了解地球的历史。