Proterozoic
.prɒtәrә'zәuik
基本解释
n. 元古代, 元古代岩
a. 元古代的, 元古代岩的
英文释义
n. from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
s. formed in the later of two divisions of the Precambrian era
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