殚精极虑
dān​jīng​jí​lǜ

rack one's brains

  • created sense approved 殚精极虑/殫精極慮 · dān​jīng​jí​lǜ · rack one's brains

    殚精极虑 / 殫精極慮

    dān​jīng​jí​lǜ

    rack one's brains

    to exhaust one's thoughts and ingenuity; to think something through thoroughly

    为了制定这个方案，他殚精极虑，整整熬了三个通宵。

    idiom

    created sense