They kept moving in a circle around the swimmers.

他们围绕着游泳的人不停地转着圈。

youdao

Both men had just begun to swim towards the shore, when they noticed with dismay that the speedboat was moving in a circle.

两个人刚开始向岸边游去，就突然惊愕地发现快艇正在转着圈行驶，它现在正以惊人的速度直冲他们驶来。

youdao

Both men had just begun to swim towards the shore, when they noticed with dismay that the speedboat was moving in a circle.

两个人刚开始向岸边游去，就突然惊愕地发现快艇正在转着圈行驶。

youdao

Suppose the particle is not moving in a circle, but does this.

假设这个质点不是做圆周运动,而是这样

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

In other words, you don't have to be moving actually in a circle to have the acceleration.

也就是说,你不必真的在一个圆上运动以获得相应的加速度

耶鲁公开课 - 基础物理课程节选

"We do a bit of endurance to get them fitter - marching on the spot, moving round the room in a circle to get the heart rate up a bit, " explained Ms Quaeck.

BBC: Balance class to help prevent falls by elderly people

He kept moving his upper body around in a slight kind of shape or circle, and the movements left a little bit of a visual trail.

NEWYORKER: Wiggle Room

It can circle in the sky for hours, using sensors to track even a moving target.

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