摩擦着的

例句：

1. 1. The car's tires were worn out, making it difficult to drive on the road.
   汽车的轮胎磨损了，很难在路上行驶。
2. 2. The old wooden chair was scratched and worn out, showing its age.
   旧木椅被划伤和磨损，显示出它的年龄。
3. 3. The metal doorknob was so worn out that it could not be turned smoothly.
   金属门把手磨损得如此严重以至于无法平滑转动。