the distance between the optical centre of a lens or mirror and the focal point
| 单词 | focal length |
| 释义 | focal lengthnounthe distance between the optical centre of a lens or mirror and the focal point |
| 随便看 |
|
英语词典包含66266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。