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	central engine central epithelial tumor of jaw central eruption Centrales central excitation central-excitation system central excitatory state central extension central extension of groups central exudative chorioretinitis central facial paralysis central facilities area central factorial moment central fan system central fattening station central fiber central fibril central field central field approximation central field of vision central figure central file central file online central fire alarm control panel central fixation

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