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	Af. AF Af. AF attention key attention line attention list attention mobility attention program attention reflex attention reflex of pupil attention rule attention signal attention span attention structure attention symbol attention to hygiene attentive attentively attentive response attenuable attenuant attenuate attenuated bacteria vaccine attenuated layer

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