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Jyutping sik1 di1 m4 sik1 di1
Pinyin shí dī wú shí dī

Definitions (Kaifangcidian)
  1. 一知半解
  2. 似懂非懂
  3. 又會又不會 – 又会又不会

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Jyutping sik1 di1 m4 sik1 di1
Pinyin shí dī n2 shí dī

Definitions (CC-CANTO)
  1. do not know something thoroughly