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	DECAampoule decaborane decacanth decacyclene decad decadal decade decade amplifier decade block decade box decade capacitance box decade capacitor decade counter decade counter circuit decade counting tube decade counting unit decade dial decadedial decade divider decade frequency divider decade inductancebox decadence decadency decadent decadent art

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