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殫精竭慮

dānjīngjiélǜ

ㄉㄢ ㄐㄧㄥ ㄐㄧㄝˊ ㄌㄩˋ

Simplified 殚精竭虑

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  1. 1to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly
  2. 2to rack one's brains
  3. 3to leave no stone unturned

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