| 单词 | brightness |
| 释义 | brightness /bruyt"nis/, n. 1. the quality of being bright. 2. Optics. the luminance of a body, apart from its hue or saturation, that an observer uses to determine the comparative luminance of another body. Pure white has the maximum brightness, and pure black the minimum brightness. [bef. 950; ME brihtnes, OE beorhtnes. See BRIGHT, -NESS] |
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