It's a physics toy that demonstrates angular momentum, potential energy, and kinetic energy.

是个物理学家的玩具可以演示角动量还有动能和势能。

So potential energy you might kind of remember from high school physics.

你们可能还记得高中物理里的势能。

When a thing is up at a height, it has stored potential energy.

当物体处于一定高度时，它储存了势能。

Yeah, so it relies a lot on I suppose gravitational potential energy.

对，我认为主要借助于重力势能。

The challenge for science was learning how to unleash this potential energy in a controlled way.

科学界面临的挑战是了解如何以一种可控的方式释放这种势能。

Which means change in potential energy of an object over time is negative velocity times force.

因此 一段时间内总能量的改变量因此 一段时间内总能量的改变量。

I think this partly because potential energy has shown itself to be pretty efficient.

我认为这部分是因为势能已经证明了它是非常有效的。

Both techniques are betting on potential energy as a solution for storing renewable energy for the grid.

这两种技术都把赌注押在势能上，将其作为为电网储存可再生能源的解决方案。

Basically converting this energy into what's called potential energy.

基本上就是把这个能量转换成所谓的势能。

But potential energy isn't the only possible solution.

但是势能并不是唯一可能的解。