roller bearing

例句：

1. 1.The new car has a roller bearing in the front axle.
   新车的前轴有一个滚动轴承。
2. 2.The engineer used a roller bearing to reduce friction and improve efficiency.
   工程师使用滚动轴承来减少摩擦并提高效率。
3. 3. Roller bearings are essential for machinery that requires high precision and durability.
   对于需要高精度和耐用性的机械，滚珠轴承是必不可少的。