| 1. | Friction increases with increasing pretension .
摩擦力随预加张力的增加而增加。 |
| 2. | The counterrotation reduces the net friction torque .
反向旋转减少了净摩擦力。 |
| 3. | The friction of cotton increases with increasing regain .
棉纤维的摩擦力随回潮率的增加而增加。 |
| 4. | Friction acts on moving bodies and brings them to a stop .
摩擦力作用于运动着的物体，并使其停止。 |
| 5. | In other words, frictional work is not completely recoverable .
换句话说，摩擦力的功不能完全回收。 |
| 6. | Frictional forces may also act when there is no relative motion .
在无相对运动的情况下，也可以有摩擦力的作用。 |
| 7. | As soon as sliding begins, it is found that the friction force decreases .
人们发现，滑动一开始，摩擦力就减小。 |
| 8. | For traction to be effective, countertraction and friction are necessary .
要使牵引有效，必须使用反牵引和摩擦力。 |
| 9. | At any rate, friction always manifests itself as a force that opposes motion .
总之，摩擦力总是表现为抗拒运动的力。 |
| 10. | The friction force is therefore called a nonconservative or a dissipative force .
因此，摩擦力称为非保守力或耗散力。 |
