单词 | color index |
释义 | color index Astron. 1. the difference between the apparent photographic magnitude and the apparent visual magnitude of a star. 2. the difference between the magnitudes of a star in any two spectral regions. [1920-25] |
随便看 |
英语词典包含168451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。