| 单词 | Oligocene |
| 释义 | Word Frequency Oligocene(ˈɒlɪɡəʊˌsiːn, ɒˈlɪɡ-) adjective 1. of, denoting, or formed in the third epoch of the Tertiary period, which lasted for 10 000 000 years noun 2. the Oligocene Word origin C19: oligo- + -cene |
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