back of the saw

例句：

1. 1. The car has a back of the saw on the side, which makes it look more stylish.
   这辆车侧面有锯齿状的背面，看起来更时尚。
2. 2. The old man had a back of the saw scar on his back, which he got from a fall in his youth.
   这位老人背部有一个锯齿状的疤痕，这是他年轻时从一次跌倒中留下的。
3. 3. The new model car has a back of the saw design, making it more attractive to young people.
   新款汽车采用了锯齿状设计，更受年轻人喜爱。