英语词汇“knock at”的读音、翻译、释义、用法及例句-开邑网

词汇	knock at
释义	knock atknock at1.■打, 捶, 敲He went upstairs and knocked at the door.他上楼敲门。Opportunity knocks at the door only once.机不可失, 时不再来。
随便看	relief welding relief well relief work relief works relief zone relier relievable relieve relieve a sentry relieved relieved compression ring relieved cutter relieved land relievedly relieved work relieved zone relieve from relieve guard relieve nature relieve of relieve oneself relieve one's feelings reliever reliever relay relieve someone of his post

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