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Jyutping muk6 bat1 kwai1 jyun4
Pinyin mù bù kuī yuán

Definitions (CC-CEDICT)
  1. lit. not even peek at the garden
  2. fig. to be absorbed in one's studies (idiom)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)