adjustable bearing

例句：

1. 1. The new machine hasan adjustable bearing that can be adjusted tofit different sizes of workpieces.
   这台新机器有一个可调轴承，可以调整以适应不同尺寸的工件。
2. 2. The engineermade a careful adjustment of the bearing toensure smooth operation.
   工程师仔细调整了轴承以确保运转顺畅。
3. 3. The old car had a worn-out bearing, which required replacement.
   旧车有一个磨损的轴承，需要更换。