| 单词 | 光量 |
| 释义 | 〔diaphragm〕A disk having a fixed or variable opening used to restrict the amount of light traversing a lens or optical system.光圈：具有固定或可变孔的圆盘，用来限制穿过透镜或光学系统的光量〔luminosity〕The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength. Also called In this sense, also called luminosity factor 发光效率：一定波长的光量对同样波长的辐射光量的比例 也作 在此意义上也可称作 luminosity factor |
| 随便看 |
学习网英语词汇栏目收词371507余条，连同派生词、复合词、词组和习语等。每个词条提供了音标、词性、释义、用法、搭配和同（近）义词等多项功能，对所收词汇进行全方位的解释和说明，内容丰富，功能全面。