| 单词 | focus |
| 释义 | focus 1(in optics) Any point in an optical system through or towards which rays of light are converged. It is sometimes called the focal point and sometimes loosely used to mean principal focus or (particularly by photographers) focal length. 2(in mathematics) See conic; ellipse. |
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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。