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Jyutping sam1 mou4 pong4 mou6
Pinyin xīn wú páng wù

Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be concentrated and single-minded
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

心無旁騖 [-无-骛]

Jyutping
Pinyin xīn wú páng wù

Definitions (CC-CEDICT)
  1. completely focused
  2. free of distractions