1. A hard blow knocked the boxer down.
   对方猛烈的一拳将这个拳击手击倒在地。
2. Why are they knocking down the wall?
   他们为什么在拆墙?
3. The crowd jeered when the boxer was knocked down.
   当那个拳击手被打倒时, 人们开始嘲笑他。
4. A mahogany table was knocked down for five pounds.
   红木桌作价五英镑被拍卖了。
5. The portable device easily knocks down.
   这种轻便装置容易拆卸。
6. The auctioneer knocked the bureau down to a furniture dealer from York.
   拍卖者将写字台卖给从约克来的家具商。
7. There was a low protecting wall to knock down the heat blasting from the pit of the furnace.
   有一堵低矮的护壁挡住从炉膛里喷出的火焰。
8. I drove down another back road which will run next to the expressway and saw a frontloader knocking down a house.
   我顺着与这条高速公路并行的另一条土路开过去，看到一台推土机正在敲倒一幢房子。

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