tumbling motion的用法和樣例：
例句
- In this paper, a new method for measuring the vertical motion straightness and rolling error of machine tools is presented.
介紹了一種測量機床豎直運動直線度和滾動誤差的新方法。 - Spheres are connected to the playfield using chains and ropes and the player must cut these constraints to put the spheres in motion.
球體與遊戲場景中鎖鏈，繩索相關聯，玩家必須切斷這些束縛球體的繩索，使球體滾動。
