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Jyutping gwong1 dou6
Pinyin guāng dù

Definitions (CC-CEDICT)
  1. luminosity
Definitions (Wiktionary)
  1. noun
    brightness; light intensity
  2. noun
    luminosity
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    曝光三角:光圈、快门、感光度
    曝光三角:光圈、快門、感光度
    bou6 gwong1 saam1 gok3 gwong1 hyun1, faai3 mun4, gam2 gwong1 dou6
    • the exposure triangle: aperture, shutter speed and ISO value