knock over 打繙；撞倒knock out sb 撞牆；把…撞倒knock out 敲空；擊倒；打破；使筋疲力竭knock on wood 敲木頭；祈求好運；吉人天相knock on the door 敲門knock on 撞擊撞出；敲擊（門、窗）knock off work 敲落工作；歇工knock off 擊倒；停工；中斷knock knock knock knees knock knee 膝外繙knock it off 停止做；住口，別再講下去了knock into a cocked hat 駁倒knock into 撞上；與…相撞knock intensity [力] 爆震強度knock in （把釘子）釘入knock down and drag out knock down 擊倒；拆卸knock die-out 爆震消除knock compound [交通運輸工程]搞爆震劑