| 单词 | geological time scale |
| 释义 | geological time scaleˌgeological ˈtime scale noun [countable] earth science the dates of the four eras of the Earth’s history, from 4,600 million years ago until the present day, and the order in which they happened. The order is: Precambrian, Paleozoic, Mesozoic, and Cenozoic. |
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