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Jyutping bou6 tau4
Pinyin bù tóu

Definitions (Wiktionary)
  1. noun
    size of a written work (chiefly of large books)
    (syn.) 篇幅
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

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Jyutping bou6 tau2
Pinyin bù tóu

Definitions (粵典–words.hk)
  1. x