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Proterozoic是什么意思？

Proterozoic

英[ˌprɔtərəˈzəuik] 美[ˌprɑtərəˈzoɪk, ˌprotə-]

n.& adj. 原生代（的）；

相关单词 Proterozoic era

例句

This type of graphite deposits were formend in the Late Archaean to Early Proterozoic. 该类矿床的成矿时代多集中在晚太古代末至早元古代初期,并且具有全球性.

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英英词典释义

Adjective
1. formed in the later of two divisions of the Precambrian era;
"proterozoic life forms"

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