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	sectional warper sectional warping sectional warping machine sectional warping sizer system sectional wheel sectional width sectional wind sectional winding section assembly section at key section base section beam section-bending machine section block section blocked section blocking section board section boss section boundary section break section breaker section canal section chief section cleared section closed up

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