"Circle Lightning", which means that Opel's unmatched strength and speed; Opel's always full of vigor and vitality.

“圆圈闪电”，即意味着欧宝汽车的力量和速度是无与伦比的；欧宝公司永远充满着生机与活力。

youdao

Uniform circular motion occurs when an object goes around in a circle and when the speed never changes.

匀速圆周运动发生在，当物体沿着一个圆环滚动，速率恒定的情况下。

youdao

And that linear velocity, which, in this case, is really your speed, is of course the circumference of the circle divided by how many seconds it takes to go around.

线速度，在这个例子里，就是速率，是这个圆环的周长，除以走一圈，需要的秒数。

youdao

I have shown you yesterday that the speed of the particle as it goes around the circle is this .

我昨天讲过,质点做圆周运动的速率等于这个

耶鲁公开课 - 基础物理课程节选

I'm asking what's the tangential speed as it moves along the circle?

它在做圆周运动时,切向速度是多少

耶鲁公开课 - 基础物理课程节选

Whenever you see a particle moving in a circle, even if it's at a constant speed, it has an acceleration, v square over r directed towards the center.

只要看到质点做圆周运动,即使是匀速圆周运动,也存在一个加速度,大小为 v^2 / r,方向指向圆心

耶鲁公开课 - 基础物理课程节选