The journal rubs against the bearing surface.

轴颈在轴承面上摩擦。

He has had a few brushes with them.

他曾与他们有点摩擦。

There is some friction among the family members.

家庭成员间有些摩擦。

He rubbed his limbs vigorously to get the blood circulating.

他用力摩擦四肢让血液循环开来。

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。

When Joan returned to work, the friction between them increased.

琼回来工作后, 他们之间的摩擦加剧了。

That door rubs on the floor.

与地板摩擦。

In designing a machine it is necessary to reduce friction as much as possible.

在设计一种机器时, 必须尽可能减低摩擦。

I can’t bear the sound of chalk scraping on a blackboard.

我受不了粉笔在板上摩擦时发出的刺耳声音。

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。

This insect makes its strange noise by rubbing its back legs together.

昆虫摩擦它的两条后腿发出一种奇怪的声音。

The continuing activities, has the friction with clothes to affect flesh's eupnea, becomes dry.

经常活动，与衣服产生摩擦而影响肌肤的正常呼吸，变得干燥。

Semimetal Brake Materialsconsist of reinforcing fiber,friction element,lubricste elementand polymer.

半金属制动材料是由增强纤维、增塑剂、摩擦组元、润滑组元和树脂组成的。

The worn surface morphology of ADZ ceramic was analyzed with a scanning electron microscope.

与去离子水相比,在小牛血清润滑条件下ADZ陶瓷的摩擦因数和磨损率降低。

Friction brake prevents overspin.

摩擦制动防止overspin 。

Matches are lighted by friction.

火柴由摩擦而生火。

Oil can reduce friction.

润滑油能减小摩擦力。

Abstract: Triboluminescence is the emission of light caused by applicationof mechanical energy to a solid.

摩擦发光物质在材料科学领域倍受人们关注。

And microscopic analysis indicates that some microsize mineral particles embedded friction surface, which make friction surface strengthened and recoverable.

同时，微观分析表明，微小的摩圣矿物粒子大量嵌入摩擦表面，可对摩擦表面起到强化和修复的作用。

Here, free electrons rub off the con ductor and create a charge imbalance that causes the current flow.

时，摩擦引起自由电子脱离导体，产生电荷不平衡，从而产生电流。