| 单词 | Carboniferous period |
| 释义 | Carboniferous period (once / 56824 pages) n WORD FAMILY Carboniferous period: Carboniferous periods USAGE EXAMPLESWhen they re-emerge, in what is called the Lower Carboniferous period, they do, indeed, live up to their potential. Economist(Dec 08, 2016) Their numbers began to decline throughout the Silurian, Devonian and Carboniferous periods, before completely petering out by the end of the Permian for reasons unknown. The Verge(Jul 10, 2016) The forest fossils were discovered in 2006 during excavations at the steelworks site, and have been dated to the Carboniferous period. BBC(May 14, 2014) n from 345 million to 280 million years ago Syn|Exp Carboniferous geological period, period a unit of geological time during which a system of rocks formed |
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