殚精竭虑 殫精竭慮
dān jīng jié lǜ
Значение
to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly; to rack one's brains; to leave no stone unturned
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dān jīng jié lǜ
to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly; to rack one's brains; to leave no stone unturned
Учить в приложении → Писать по чертам