lower bearing

例句：

1. 1. The machine has a lower bearing that allows it to run smoothly.
   这台机器有一个低轴承，使其运行顺畅。
2. 2. The engineer carefully checked the lower bearing for any signs of wear.
   工程师仔细检查了下轴承，看看是否有磨损的迹象。
3. 3.Lower bearings are more prone to failure than higher ones.
   较低的轴承更容易发生故障。