| 单词 | perpetual motion[U] movement (eg of an imagined ma |
| 释义 | perpetual motion[U] movement (eg of an imagined machine) that would continue for ever without getting power from an outside source 永动（不需外加能量永久运转, 如假想的机器）. |
英汉双解词典包含38652条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。