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English definition of “flog a dead horse”

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flog a dead horse

UK informal ( US informal beat a dead horse)
to waste effort on something when there is no chance of succeeding: He keeps trying to get it published but I think he's flogging a dead horse.
Translations of “flog a dead horse”
in Chinese (Traditional) 做無用功,做徒勞無益的事…
in Chinese (Simplified) 做无用功,做徒劳无益的事…
(Definition of flog a dead horse from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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