词汇 |
Precambrian |
释义 |
PrecambrianPre·cam·bri·an /priːˈkæmbriən/ adjectiveadj belonging or relating to the period of time in the Earth’s history from about 4,600 million years ago, when the hard outer surface of the Earth first formed, until about 570 million years ago, when simple forms of life first appeared on the Earth 前寒武纪的〔从约46亿年前地球外层硬地表最初形成,至约5.7亿年前地球上最早出现简单形式生命的那段时间〕 |
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