“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。
随便看	projective cover projective covering projective curvature projective curvature tensor projective curve projective deformation projective design projective determinacy projective determinacy axiom projective determination projective differential geometry projective dimension projective dimension of a module projective displacement projective distance projective duality theorem projective element projective elimination ideal projective embedding projective embedding theorem projective equivalence projective extension projective extension theorem projective fiber bundle projective finite geometry

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