| 单词 | the tertiary period |
| 释义 | the Tertiary period in British English another name for Tertiary See full dictionary entry for Tertiary periodthe Tertiary period or rock system, divided into Palaeocene, Eocene, Oligocene, Miocene, and Pliocene epochs or series Tertiary in British English (ˈtɜːʃərɪ) adjective 1. of, denoting, or formed in the first period of the Cenozoic era, which lasted for 63 million years, during which mammals became dominant noun 2. the Tertiary |
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