轮子

In 1863, an American developed the first roller skate with wheels attached side by side.

在1863年，一个美国人发明了第一双带有两排轮子的四轮溜冰鞋。

A small, spokeless wheel, such as that of a roller skate or caster.

滚轮：如旱冰鞋或小脚轮上没有辐条的小轮子

The first mass-produced roller blades, while innovative had some design flaws: they were difficult to put on and adjust, prone to collecting dirt and moisture in the ball-bearings, the wheels were easily damaged and the brakes came from the old roller skate toe-brake and were not very effective.

早期的大量生产的单排轮滑鞋，有一些设计上的问题：它们很难穿上和调整，容易沾上污物，轮子容易损坏，球轴承容易潮湿，来自老式轮滑鞋的刹车装置不是很有效。

Roller and Skate Wheel Conveyors.

滚筒和溜冰鞋轮子运送装置。

Why have rats not evolved bony wheels, similar to roller skates?

为什么老鼠没有进化出类似于滑轮溜冰鞋的骨质的轮子呢？

Through the years, Rollerblade has achieved several industry firsts, such as the use of polyurethane boots and wheels, metal frames, dual bearings and heel brakes.

数年来， Rollerblade 已经创造了无数的行业第一，例如使用聚氨酯靴底和轮子、金属刀架、双轴承以及后跟制动。

You can rotate the wheel with your hand.

你可以用手转动轮子。

If the wheel is rotating counterclockwise, its angular-momentum vector is directed eastward .

如果轮子是逆时针方向旋转，其角动量矢量的方向朝东。

Green was a fighter pilot for the UK Royal Air Force for 20 years, and he is also the fastest man on wheels.

格林是一个20年的英国皇家空军战斗机飞行员，他也是在轮子上跑得最快的人。

I'm not suggesting you have to ride around on a running board with a revolver.

我不是说您非得脚踏带着轮子的滑板到处招摇

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失