main bearing of rotary

例句：

1. 1.The main bearing of the machine is located at the center of the table.
   机器的主要轴承位于桌子的中心。
2. 2. The main bearing of the car is responsible for turning the wheels.
   汽车的主轴承负责转动车轮。
3. 3. The main bearing of the engine is essential for its operation.
   发动机的主要轴承对于其运行至关重要。