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Jyutping bou2 baak6
Pinyin bǔ bái

Definitions (CC-CEDICT)
  1. to fill a gap (e.g. a gap in knowledge or blank space in a print layout)
  2. to make some additional remarks
  3. filler (in a newspaper or magazine)
Definitions (Wiktionary)
  1. noun
    filler (in a magazine or newspaper)
  2. verb
    to provide further explanation
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)