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Precambrian 音標拼音: [prik'æmbriən] n. 前寒武紀,前寒武層 前寒武紀,前寒武層 Precambrian
n 1: the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago [synonym: {Precambrian}, {Precambrian eon}, {Precambrian aeon}, {Precambrian period}]
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