wear-and-tear part

例句：

1. 1. The car's engine is wearing out quickly.
   这辆车的发动机很快就磨损了。
2. 2. The old bicycle is a wear-and-tear part of my childhood memories.
   那辆旧自行车是我童年记忆的一部分，已经磨损不堪了。
3. 3. The old car has many wear-and-tear parts that need to be replaced.
   这辆旧车有很多需要更换的磨损部件。