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English definition of “if it ain't broke, don't fix it”

if it ain't broke, don't fix it

informal saying
said when you recognize that something is in a satisfactory state, and there is no reason to try to change itUndamaged, unbroken or in good condition
(Definition of if it ain't broke, don't fix it from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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