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Proterozoic n. 原生地
a. 原生代的 原生地原生代的 proterozoic
adj 1: formed in the later of two divisions of the Precambrian era; "proterozoic life forms" n 1: from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms [synonym: {Proterozoic}, {Proterozoic eon}, {Proterozoic aeon}]
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