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	nominal pressure grade nominal price nominalprice nominal productive head nominal profit nominal pull nominal pullin torque nominal pull-in torque nominal quotation nominal ram pressure nominal range nominal range of use nominal rate. nominal rate nominal rated power nominal rated speed nominal rate of exchange nominal rate of rise nominal rate of the spring nominal rating nominal ratio nominal rent nominal resistance nominal resolution nominal revenues

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