spare parts for finishing thresher

例句：

1. 1. The car needssome spare parts to be repaired.
   这辆车需要一些备用零件来修理。
2. 2. Weneed to buy spare parts for the brokenmachine.
   我们需要为损坏的机器购买备用零件。
3. 3.The mechanic replaced the engine with a sparepart.
   机械师用一个备用零件替换了发动机。