撞倒 knock down ; run over ; knock off

被撞倒在地 be knocked to the ground

撞倒某人 Knock over sb ; knock sb down ; knock down ; Hit SB

把某人撞倒 run sb down ; knock over ; Knock sb over ; knock sb. down

倒车碰撞预防系统 BCI

敲门/撞上/撞倒 knock at/...into... /down ; knock at

被撞倒 be knocked down

倒车撞上 back into

撞倒障碍 kneck down