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\ 前寒武纪的例句（前寒武纪在句子中的用法）

前寒武纪的例句（前寒武纪在句子中的用法）

Late Precambrian mafic dyke swarms are extensively developed in the central North China Craton. 华北克拉通中部广泛发育晚前寒武纪镁铁质岩墙群.
Gneiss, a metamorphic rock, can be commonly found in Precambrian areas. 片麻岩, 变质岩, 可以发现,在常见的前寒武纪地区.
Two main glacial epochs affected both areas during the last 100 million years of Precambrian times. 在前寒武纪的最后1亿年中，两个主要的冰川时期对两个地区都产生了影响。

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