| 单词 | Eocene |
| 释义 | Word Frequency Eocene(ˈiːəʊˌsiːn) adjective 1. of, denoting, or formed in the second epoch of the Tertiary period, which lasted for 20 000 000 years, during which hooved mammals appeared noun 2. the Eocene Word origin C19: from eo- + -cene |
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