Read Edit View history 元古代 Yuángǔdài Proterozoic Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 元古代 Yuángǔdài Proterozoic time word · Proterozoic (geological era 2500-540m years ago) 元古代是地壳演化的重要阶段。 Edit Delete References Add reference No references for this word.
元古代 Yuángǔdài Proterozoic time word · Proterozoic (geological era 2500-540m years ago) 元古代是地壳演化的重要阶段。 Edit Delete