glacial period
柯林斯词典
1. N any period of time during which a large part of the earth's surface was covered with ice, due to the advance of glaciers, as in the late Carboniferous period, and during most of the Pleistocene; glaciation 冰河時期
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glacial period
剑桥词典
- a time in the past when the temperature was very cold and glaciers covered large parts of the earth
冰（川）期，冰河時代