v.敲,碰;打通;把…撞击成(某个状态);打破;(心)怦怦跳,(膝盖)打哆嗦;发碰撞声;批评;打球;
n.敲击声;撞击;
例句:
Mike can knock over three or four of those simple drawings in a day.
迈克一天可完成三四张那样简单的图画.
Why doesn't he just knock the wall down?
他为何不干脆把墙推倒?
Run for the doctor and knock him up.
快去请医生,把他叫起来.