短语词组短语knock k at 敲门;敲knock k at the door 敲门knock lightly at the door 轻轻敲门knock at a door 敲门knock at vat 敲缸knock at the door 敲门;款门knock at on 敲knock at the dock 连锁在船坞knock at my door 敲我的门 返回 knock at