moving trajectory的用法和樣例：
例句
- Avoid sudden changes of the trajectory path underwater.
避免水下運動(dòng)軌跡的突然改變。 - By designing the negative shift for the sprocket, its trajectory coincides with the theoretical one, and the meshing quality is improved.
通過(guò)對鏈輪的負變位設計，使運動(dòng)軌跡與理論軌跡重合，提高了嚙合質(zhì)量，并對嚙合的重合度作了分析計算，對重合度的選擇提供了依據。
