knock down
1.打倒，击倒；撞倒；击落：
The angry man knocked him down.
那个愤怒无比的人将他击倒了。
I carelessly knocked the chair down.
我不小心将椅子撞倒了。
2.毁掉，拆毁，破坏：
It's a pity that the old house was knocked down.
很可惜，那幢老房子被拆毁了。
3.拆卸；拆散(以便于装运)：
The machine has been knocked down ready for shipment.
机器已拆好准备装船。
