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Jyutping sou1 daa2 fan2
Pinyin sū dǎ fěn

Definitions (Wiktionary)
  1. noun
    baking soda
    (syn.) 梳打粉

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Jyutping sou1 daa2 fan2
Pinyin sū dá fěn

Definitions (CC-CEDICT)
  1. baking soda