英语词汇Proterozoic aeon的读音、用法、中文释义、短语词组及例句-英汉双解词典

单词	Proterozoic aeon
释义	Proterozoic aeon 翻译元古代日系英英释义 Noun 1. from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
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Proterozoic aeon