1. become dull or lusterless in appearance; lose shine or brightness, as of a varnished surface. 
   涂漆的表面，呈现出变钝或没有光泽，失去光泽或光亮。
2. The unit of brightness in the centimeter-gram-second system, equivalent to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter. 
   朗伯在厘米－克－秒制中的一种亮度单位，相当于完全漫射的表面上辐射或反射1流明每平方厘米的亮度
3. a cgs unit of illumination equal to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter. 
   厘米克秒单位之中的照度等于反射或反射一流明每平方厘米的完全漫反射的亮度。
4. A unit of retinal illumination, equal to the amount of light that reaches the retina through1 square millimeter of pupil area from a surface having a brightness of1 candela per square meter. 
   光度视网膜亮度单位，相当于每平方米有一烛光亮度的表面，通过一平方毫米的瞳孔区域，到达视网膜的光线数量
5. Stars vary in brightness. 
   星星光亮度不同。

查看更多例句 相关情景会话

• 1. 表面亮度
  主观亮度 surface brightness...表面亮度 tonal brightness...色调亮度 total brightness
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