英语词汇“knock at”的读音、翻译、释义、用法及例句-智慧网

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	broken flange detector finger broken foreland basin broken furrow channelling diode channelling effect channellized time dividing channel management channel manager channel map channel marker channel marking channel mask channel material channel matrix channel miles channel mold channel monitor channel morphology channel mould channel-mouth bar channel multiplier array s channel net loss channel net loss stability channel noise channel nozzle

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