linear [motion] bearing

例句：

1. 1.The linear motion of the car is smooth and efficient.
   汽车的线性运动平稳高效。
2. 2.The linear support system is designed to distribute weight evenly.
   线性支撑系统设计用来均匀分配重量。
3. 3. The linear motion of the robot is controlled by a computer program.
   机器人的线性运动由计算机程序控制。