英语词汇“失效”的读音、翻译、释义、用法及例句-初旭网

词汇	失效
释义	失效 1. to lose efficacy; to cease to be effective; to break down 2. (of a treaty, an agreement, etc.) to be no longer in force; to become invalid; to be out of date; to run out 3. dead; extinct; inactive 4. [Law] to prescribe 5. annulment; extinguishment
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