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二叠纪末大灭绝
释义
二叠纪末大灭绝
Encyclopedia
理学
古生物学
释
End-Permian mass extinction
二叠纪末大灭绝
距今约2.52亿年,地球生物圈发生的一次全球性的大规模的集群灭绝事件。
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Police Literature and Arts Association of China
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policeman-on-point-duty curve
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