signs of wear

例句：

1. 1. The old shoes are starting to wear out.
   旧鞋子开始穿破了。
2. 2. The car's tires are wearing out quickly.
   汽车的轮胎很快就磨损了。
3. 3. The paint on the walls is starting to wear off.
   墙上的油漆开始剥落了。