And they are in motion and moving at very, very high speed.

它们都在运动,以非常非常高的速度运动。

麻省理工公开课 - 固态化学导论课程节选

And you can hear them together, Yeats moving from one to another with, oh, incredible speed and agility in that final strophe of the poem, on the next page.

而你可以听出所有，在诗的第三节中，叶芝转换得很快,很敏捷，翻到下一页。

耶鲁公开课 - 现代诗歌课程节选

The electron is not moving at the speed of light.

电子不是以光速运动的。

麻省理工公开课 - 固态化学导论课程节选

At this instant, the planet may be moving at that speed.

在这个时刻,行星可能在以这个速度运动

耶鲁公开课 - 基础物理课程节选

A clock tells you what time it is, but you can also say what time it is by seeing how fast the particle is moving because you know it started with some speed.

时钟能告诉你现在的时间,但你也可以通过测量质点速度,来判断当前的时间,因为你知道它的初速度

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