| 单词 | Phanerozoic |
| 释义 | Phanerozoic (extremely rare) n WORD FAMILY Phanerozoic USAGE EXAMPLES"There seems to have been a dramatic improvement in the habitability of the Earth at around the Precambrian–Phanerozoic boundary," Williams said. Scientific American(Feb 12, 2012) n the period from about 5,400 million years ago until the present Syn|Exp Phanerozoic aeon, Phanerozoic eon aeon, eon the longest division of geological time |
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