动轮的英文：
traction wheel

参考例句：

The connecting rod actuates the driving wheels of a locomotive.
连杆激活铁路机车的传动轮

traction wheel
(机车的)主动轮

This driving wheel engages with that servo wheel and turns it
这个传动轮与那个伺服轮相啮合,并使它转动。

This driving wheel engages with that servo wheel and turns it.
＂这个传动轮与那个伺服轮相啮合，并使它转动。＂

The driven gear fits its driving gear like a glove.
这个从动齿轮与它的主动轮啮合得非常好。

"In the drum-and-shoe type, there is a wheel Brake cylinder with two pistons."
在蹄一鼓式制动器中,有一个带有两个活塞的制动轮缸。

Onscreen thumbwheels look rather like the scroll wheel on a mouse, and behave in much the same way.
屏幕上的拇指轮看上去就像鼠标上的滚动轮，行为也非常相似，并普遍用在某些三维程序中。

traction是什么意思：
n. 牵引；附着摩擦力；牵引力

Spikes provide greater traction.
钉鞋可提供更大的附着摩擦力。

Is there an alternative to traction for a broken leg?
对于腿部骨折有什么方法替代牵引治疗吗？

interfacial tractions at the broken ends will produce delamination
断头处的界面引力将引起分层。

Coefficient of viscous traction (=Trauton's coefficient)
拉伸粘性系数,粘性曳引系数

Why America cannot see that it is losing traction?
为什么美国看不到它正在失去牵引力？

wheel是什么意思：
n. 轮，转向盘，推动力，控制力，机构，旋转，掌权者
v. 改变主意，使转弯，盘旋，引来

There axe wheels within wheels.
齿轮中有齿轮(幕后另有操纵者)。

Fly on the wheel
狂妄自大的人

The wheels screwed.
轮子旋转着。

This wheel engage with that wheel and turns it.
这个轮子与那个轮子啮合，并使它转动。

This driving wheel engages with that servo wheel and turns it
这个传动轮与那个伺服轮相啮合,并使它转动。