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例句
英英词典释义
行业词典释义

福克斯词典 \ 英汉词典 \

Precambrian是什么意思？

Precambrian

英[ˈpri:ˈkæmbriən] 美[priˈkæmbriən]

n. 前寒武纪，前寒武层；

例句

Precambrian time for as much as eighty - five percent of all geological time. 从前寒武世纪以来地球地面大部分被冰川所覆盖的任何地质年代.
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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英英词典释义

Noun
1. the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago

行业词典

地质学：前寒武纪；
生态学：前寒武纪；从46亿年前地球诞生一直到5.7亿年前寒武纪开始这一段地质历史时期。；

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