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Jyutping lau4 on1 sou3
Pinyin liú ān sù

Definitions (Wiktionary)
  1. noun
    thiamine

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Jyutping lau4 on1 sou3
Pinyin liú àn sù

Definitions (CC-CEDICT)
  1. thiamine
  2. vitamin B1
Definitions (Wiktionary)
  1. noun
    thiamine