| 单词 | radium clock |
| 释义 | radium clocknoun : an electroscope alternately charged by the accumulation of alpha particles from radium in a closed tube and discharged by automatic grounding at regular intervals |
| 随便看 |
英语词典包含469781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。