Set your car to cruise control or try driving at a consistent speed.

把你车调到巡航控制状态或试着匀驾驶。

It basically helps the boat float more evenly at all times, making loading at docks and sailing easier.

这有助于货轮始终匀地漂浮，使码头装货和航行更容易。

And now instead of assuming that this block is stationary, let's assume that it's moving with a constant velocity.

假设它以匀运，假设它以匀运。

And whether it's speeding up,   slowing down or staying constant.

无论是加、减还是保持匀。

An object in motion stays in uniform motion unless acted upon by an external force.

一个物体保持匀运，除非受到外力作用。

And so this is a graph of an object that has constant velocity.

这是一张表示物体匀运表。

You might recognize those terms, because we’ve already talked about them in our episode on uniform circular motion.

您可能认得这些术语， 因为我们已经在匀圆周运一集中讨论过它们。

When flying along at constant speed, these forces must be perfectly balanced by the tension in the rope.

当匀飞行时，这些力必须通过绳索张力完美平衡。

This is the same type of velocity we used when we talked about the physics of uniform circular motion.

这与我们使用度相同 我们讨论了匀圆周运物理学。

You might recognize those terms, because we've already talked about them in our episode on uniform circular motion.

您可能会认出这些术语，因为我们讨论过它们 已经处于匀圆周运循环中。

Speeding up, slowing down and staying constant  are still the only options you need to choose from though.

加、减和保持匀仍然是你需要选择唯一选项。

The second part of the question, speeding up, slowing down, or staying constant,   takes a little bit more thought.

问题第二部分，加、减还是保持匀，则需要多一些思考。

And if you want  to stay constant, make it exactly the same.

如果你想保持匀，就让它完全一样。

And  if you want to keep your speed constant, make your spacing the exact same  as those previous two frames.

如果你想保持匀，就把间距设置成和前两帧完全一样。

When we first start animating, it's tempting to make everything move at a  constant speed.

当我们刚开始制作画时，很容易想让所有东西都以匀移。

So, let’s recall what we know about uniform circular motion, to see what it can tell us about simple harmonic motion.

那么，让我们回顾一下我们对匀圆周运了解， 看看它能告诉我们什么关于简谐运。

It's known as uniform circular motion, and it's what occurs when anything moves along a circular path in a consistent way.

它被称为匀旋转运 当物体在圆形路径上匀运时。

Let's look at something moving at a constant  speed.

让我们看看以匀运东西。

So, let's recall what we know about uniform circular motion, to see what it can tell us about simple harmonic motion.

让我们回忆一下我们对匀圆周运了解， 让我们看看它可能会告诉我们关于简谐运信息。

In fact, many animation programs use a constant speed as their default  and it's easy to understand why we do it.

事实上，许多画软件默认使用匀，这样做很容易理解。