linear motion的用法和樣例：
例句
- The tendency of a body in motion to continue in motion along a straight line is known as inertia.
運動物體繼續作直線運動的傾向叫慣性。 - A mechanical movement includes a frame adapted to move only along a linear path of travel.
機械運動包括一個適合於只沿著直線運動的框架。 - The practical use of synchronous spindles however shows that the dynamics of the spindle and linear drives produce mistakes in the synchronisation.
但實際使用同步主軸，同步化過程顯示，軸的動態運動和線性運動產生錯誤。
