ruton

例句：

1. 1.The car has four wheels and a flattire.
   这辆车有四个轮子和一个瘪了的轮胎。
2. 2. The train has two setsof wheels on each side.
   火车每边有两个轮子。
3. 3. The truck has a large wheelbase for better stability.
   卡车有一个较大的轮距，以获得更好的稳定性。