短语词组短语cretaceous Cret 白垩系;白垩纪Cretaceous World 白垩纪世界Cretaceous Coniacian 白垩系康尼亚克阶low cretaceous 下白垩统Cretaceous Reservoirs 陆东cretaceous granites 白垩纪花岗岩Cretaceous Research 白垩纪研究Late Cretaceous 晚白垩世cretaceous period 白垩纪 返回 cretaceous