1 . 爆震音
knocker 敲门者knocking爆震音knockout 击昏
2 . 敲门声
i was drinking when i heard the knocking., 听到敲门声时我正在喝酒.
3 . 敲击声
a goblin or dwarf said to live under the earth and direct miners to ore by knocking.指矿怪传说中一种生活在地下的妖怪或矮人,用敲击声向矿工指明矿藏所在地
4 . 江桥
to balance the Panyu been knockingtraffic , the need for regulation and control of traffic flow and the establishment of administrative fees and charges continue to Luoxi Bridge toll booths .为平衡过往番禺过江桥的交通流量,需要开征为调控交通流量而设置的行政性收费,继续在洛溪大桥收费站收费。