Don't confuse it with angular velocity.

不要把它，和角速度混淆。

So it has a phenomenal angular velocity.

它有个明显的角速度。

In physics we call it angular velocity.

在物理上我们称之为角速度。

The actual speed is the radius times angular velocity.

实际的速度就是半径乘以角速度。

So this is a linear velocity, this is an angular velocity.

因此这是线速度，那个是角速度。