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Jyutping hat6 wong4 sou3
Pinyin hé huáng sù

Definitions (CC-CEDICT)
  1. riboflavin (vitamin B2)
Definitions (Wiktionary)
  1. noun
    riboflavin
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)