球套英语怎么说

球套在英文中叫做 "ball bearing"。这个词源于拉丁文，"ball" 指的是球形物体，"bearing" 指的是支撑或支承的意思。因此，球套就是用来支撑并使两个部件能够轻松滑动或旋转的装置。

例句：

The ball bearings in the wheel allow it to spin smoothly. (球套在轮子里使它能够平稳旋转。)
The ball bearings in the hinge allow the door to open and close easily. (球套在铰链里使门能轻松开合。)
The ball bearings in the engine help reduce friction and improve efficiency. (发动机里的球套有助于减少摩擦，提高效率。)