frictional energy

例句：

1. 1. The frictional force between thetwo objects is what causes them to move.
   两个物体之间的摩擦力是导致它们移动的原因。
2. 2. The frictional force between the movingparts of a machine can cause wear andtear.
   机器运动部件之间的摩擦力会导致磨损。
3. 3.The frictional energy generated by the movementof the wheels is used to power thecar's engine.
   车轮的运动产生的摩擦能被用来为汽车的引擎提供动力。