They store the energy mechanically by rotating mass around an axis.

它们通过质量绕轴旋转机械存储能量。

youdao

And suppose I'm rotating it about an axis perpendicular to the blackboard through that point.

假设我将其绕着，通过这点垂直于黑板，的轴旋转。

youdao

A large window facing north towards the courtyard consists of five separate doors, each rotating and connected on a central axis.

朝北的大型窗户面向院子，包括五个单独的门，每一个门通过中心轴旋转和连接。

youdao

The Focault pendulum is one example where you can see that the Earth is rotating around its own axis.

傅科摆就是一个例子,通过观察它,你会发现地球在自转

耶鲁公开课 - 基础物理课程节选

One way to think about it, if we want to use a classical analogy, which often helps to give us an idea of what's going on, is the spin of an electron, we can picture it rotating on its own axis.

如果我们用一个，经典的比喻来考虑它的话，这经常会帮助我们建立起一些概念，就是我们可以把电子的，自旋想象是它绕着轴自转。

麻省理工公开课 - 化学原理课程节选

So, there is a way to go from the unprimed coordinates to the prime coordinate by rotating your axis and actually calculating the components.

现在我们有一种方法可以从原坐标系,转变到新坐标系,只要旋转坐标轴,并实际地计算一下坐标即可

耶鲁公开课 - 基础物理课程节选

Matija Cuk, from the Seti Institute, and colleagues ran new simulations in which the early Earth was rotating on its axis in just a few hours prior to the impact - compared to the present 24 hours.

BBC: Moon formation: New spins put on old questions