adj.未装配的,拆装的;
例句:
Our house is being knocked down to make way for a new road.
我们家的房子正被拆毁以筑新路.
A mahogany table was knocked down for five pounds.
红木桌作价五英镑被拍卖了.
She knocked down forty dollars at a restaurant.
她在一家饭馆花掉40美元.