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English definition of “belt and braces”

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belt and braces

UK informal
the use of two or more actions in order to be extra careful about something, although only one is really necessary: I wrote to them and phoned as well - belt and braces, I admit.
Translations of “belt and braces”
in Chinese (Traditional) 雙重保險,萬無一失…
in Chinese (Simplified) 双保险,万无一失…
(Definition of belt and braces from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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