And,friction stir welding uses fewer workers at less cost than other methods.

VOA: special.2009.12.30

That means the force you're applying is cancelled by another force, which has got to be the force of friction.

意味着你施加在物体上的力被另一个力抵消了,这个力就是摩擦力

耶鲁公开课 - 基础物理课程节选

This little felt thing there is just to avoid too much friction from building up with the plastic or to keep it slightly separated from the case, but that's it. That's all there was to those things called floppy disks.

这种毡制品的目的是避免,由塑料组成所产生的摩擦力,或者保持稍微的距离，这就是我们要说的,软盘的全部内容。

哈佛公开课 - 计算机科学课程节选

And we have not had the kinds of friction that's been seen in the past.

VOA: standard.2009.12.12

But we all know that the reason things come to a halt when you push them is, there eventually is some friction or drag or something bringing them to rest.

但我们都知道,推完之后会停下来的原因就是,最后还是有某种摩擦或者拖拽,或者别的什么使得物体静止下来

耶鲁公开课 - 基础物理课程节选

Of course,the biggest difference between the two bills, and one likely to cause the most friction in House-Senate negotiations, involves the so-called "public option" or competing insurance the government would offer.

VOA: standard.2009.12.25

So force of friction is yet another force.

摩擦力就是另外一种力

耶鲁公开课 - 基础物理课程节选

The cattle are very thirsty at this point, the rains have not come yet, they need to get to the water points, and water points are dried up all along those regular migration routes, and that has been one of the causes of the friction."

VOA: standard.2010.03.23