| 单词 | lifetime |
| 释义 | lifetime The average time spent by an elementary particle or radioactive nucleus in a certain state before decay occurs or before there is a transition from an atom in an excited state to a lower energy state |
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物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。