brightness
  光亮,明亮,聰明
  bright·ness /ˈbraɪtnəs/ 名詞
  亮度,輝度
  brightness
  亮度	BRT
  brightness
  亮度
  Bright·ness, n.
  1. The quality or state of being bright; splendor; luster; brilliancy; clearness.
     A sudden brightness in his face appear.   --Crabbe.
  2. Acuteness (of the faculties); sharpness 9wit.
     The brightness of his parts . . . distinguished him.   --Prior.
  Syn: -- Splendor; luster; radiance; resplendence; brilliancy; effulgence; glory; clearness.
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  brightness
       n 1: the location of a visual perception along the black-to-white
            continuum [ant: dullness]
       2: intelligence as manifested in being quick and witty [syn: cleverness,
           smartness]
       3: the quality of being luminous; emitting or reflecting light;
          "its luminosity is measured relative to that of our sun"
          [syn: luminosity, brightness level, luminance, luminousness,
           light]