英语词汇“tried and tested (or tried and trusted or tried and true)”的意思、释义、用法解释及翻译-春雷网

词汇	tried and tested (or tried and trusted or tried and true)
释义	请查阅词条：tried and tested (or tried and trusted)
随便看	contractorize contractorize contractors contract out contract out contract out contracts contract something out contract something out contract sth out contract to buy contractual contractually contractually contractual nature contractural contracture contractured contractures contradance contradances contradict contradictable contradictable contradict each other

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