By the Early Permian, synapsids became much more common in fossil assemblages.
到二叠纪早期,合弓类动物在化石组合中变得更加普遍。
单词 | fossil assemblage |
例句 |
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PBS地球-动物趣闻 By the Early Permian, synapsids became much more common in fossil assemblages. 到二叠纪早期,合弓类动物在化石组合中变得更加普遍。 |
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