| 单词 | index fossil |
| 释义 | index fossilˈindex ˌfossil noun [countable] science, biology a fossil of a creature that is known to have lived during a particular period of time in the Earth’s history, used to learn the age of rock in which it was found |
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英语词典包含48224条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。