Read Edit View history 元古宙 Yuángǔzhòu Proterozoic Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 元古宙 Yuángǔzhòu Proterozoic noun · Proterozoic eon (geological eon from 2500 to 645 million years ago) 元古宙时期，地球上开始出现最早的多细胞生物。 Edit Delete References Add reference No references for this word.
元古宙 Yuángǔzhòu Proterozoic noun · Proterozoic eon (geological eon from 2500 to 645 million years ago) 元古宙时期，地球上开始出现最早的多细胞生物。 Edit Delete