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殚精极虑

dān jīng jí lǜ

4-character word Traditional 殫精極慮

What 殚精极虑 means

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

The characters in 殚精极虑

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