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三叠纪
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三叠纪
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理学
中生代
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Triassic Period
三叠纪
中生代的第一个纪。开始于(2.5217±0.0006)亿年前,结束于(2.0103±0.002)亿年前。在此时期形成的地层称为三叠系(Triassic System)。
Biology
Triassic
三叠纪
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