Taivo A Taiwan Mandarin dictionary

博而不精

bóérbùjīng

ㄅㄛˊ ㄦˊ ㄅㄨˋ ㄐㄧㄥ

  1. 1extensive but not refined (idiom); to know something about everything
  2. 2jack-of-all-trades, master of none

Keep 博而不精 and it comes back until you know it.

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