“End-Cretaceous mass extinction”的概念、定义、翻译、参考文献-科学参考

单词	End-Cretaceous mass extinction
释义	End-Cretaceous mass extinction Encyclopedia 理学古生物学释 End-Cretaceous mass extinction白垩纪末大灭绝距今6500万年左右，地球生物圈遭受的一次大规模的集群灭绝事件。
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