freely-movable bearing

例句：

1. 1. The new designof the machine has a freely movable bearing that allows for smoother operation.
   这台机器的新设计有一个自由可移动的轴承，使得操作更加顺畅。
2. 2.The engineers carefully selected the materials for the bearing to ensure its freely movable nature.
   工程师们仔细选择了轴承的材料，以确保其自由可移动的特性。
3. 3.The newly developed bearing is designed to be easily replaced without affecting the machine's freely movable parts.
   新开发的轴承设计得易于更换，不会影响机器的自由可移动部件。