worn profile tread

例句：

1. 1.The old car had worn tire treads that were difficult to see.
   这辆旧车轮胎上的花纹已经磨损得难以辨认了。
2. 2. The new tires on the truck are designed with worn tire treads in mind.
   卡车上的新轮胎设计时考虑到了磨损轮胎花纹。
3. 3. The engineer studied worn tire treads to improve the performance of the tire.
   工程师研究磨损轮胎花纹以改进轮胎的性能。