plane motion的用法和样例：
例句
- Planar motion also requires that axes of all prismatic pairs and all revolute axes be normal to the plane motion.
平面运动需要所有的棱形副的轴和转动副的轴都垂直于运动平面。 - The equations of the AUV motions in the body-fixed horizontal plane are established, and they are linearized over a specified operating point to suit for the controller design.
建立了自治水下机器人在体坐标系下水平面运动的运动方程，并在特定的工作点对方程进行了线性化处理，得到了自治水下机器人的控制设计模型。
