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	insulated riser insulated roof insulated shield cable insulated sleeve insulated sling insulated space insulated spring insulated storage container insulated stream insulated stretcher insulated substrate monolithie circuit insulated supply system insulatedswitch rod insulated switch section insulated system insulated tape insulated tape heating element insulated tension pole insulated thermistor insulated transition mast insulated transport insulated truck insulated tube insulated van insulated vehicle

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