“cretaceous period”可以造什么句,cretaceous period造句
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2、It is well known that modern aves lack dentition unlike their toothed ancestors of the Jurassic and cretaceous periods.
1、cretaceous period [ system ]
2、It is well known that modern aves lack dentition unlike their toothed ancestors of the Jurassic and cretaceous periods.
1、cretaceous period [ system ]