track surface

例句：

1. 1.The train tracks are made of steel and are very durable.
   火车轨道是由钢制成的，非常耐用。
2. 2. The engineer carefully measured the track surface to ensure a safe crossing.
   工程师仔细测量了轨道表面，以确保安全过河。
3. 3. The new track surface is designed to reduce wear and tear on the wheels.
   新的轨道表面设计来减少车轮的磨损。