| 单词 | opacity |
| 释义 | opacity The extent to which a medium is opaque to electromagnetic radiation, especially to light. It is the reciprocal of the transmittance. A medium that is opaque to X-rays and gamma rays is said to be radio-opaque |
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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。