adj. preglacial
... 冰河期以后的 postglacial 冰河期前的 preglacial 最大冰河期 glacial maximum ...
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Huronian冰河期的早期,也就是从24亿到23亿年前,似乎特别寒冷,整个地球第一次冰冻起来。
The early stages of the Huronian, from 2.4 to 2.3 billion years ago, seem to have been particularly severe, with the entire planet frozen over in the first "snowball Earth".
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