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- Friction causes a rolling ball to stop finally. 摩擦力使滚动的球最终停了下来。
- Constant friction wore out the heels of my shoes. 不断的摩擦磨损了我的鞋跟。
- Friction between two sticks can create a fire. 两个棍棒相互摩擦能起火。
- In the absence of friction belted machinery would not be used. 没有摩擦力，皮带传动的机器就无法使用。
- Matches are lighted by friction. 火柴由摩擦而生火。
- There is a great deal of friction between the management and the work force. 劳资双方之间存在大量矛盾。
- A friction match with a large head capable of burning in a wind. 耐风大头火柴一种能够在风中燃烧的通过磨擦点火的大头火柴
- Friction lowers the efficiency of a machine. 摩擦减低机器的效率。
- You could not walk if there were not some friction. 假若没有摩擦，你就不能行走。
- Adhesive friction, as of a wheel on a track or a tire on a road. 附着摩擦力粘附性摩擦，如车轮在轨道上或轮胎在路面上的
- Friction gradually caused the sliding box to slow down and stop. 摩擦力使向下滑的箱子渐渐慢下来后停住。
- There is some friction among the family members. 家庭成员间有些摩擦。
- Friction cannot be disposed of so easily. 摩擦是不能轻易消除的。
- If it were not for friction, you could not walk. 要不是由于摩擦，你就不能行走。
- To wear down or rub away by friction; erode. 磨蚀，磨损因摩擦而破损或擦伤；侵蚀
- Why heat can be produced by friction is clear now . 摩擦能产生热的原因现在清楚了。
- In order to reduce friction, the moving parts of a machine are often oiled. 为了减少摩擦，机器的可动部件常常涂上润滑油。
- Oil is put in machinery to reduce the friction. 把油涂到机器上减少摩擦。
- We can see that friction is not always bad things. 我们可以看到摩擦并非总是坏事情。
- One other law of friction should be noted. 摩擦力的另一个定律也应被注意。
