A falling object gains momentum as it falls.

下落的物体下落时增加。

Perhaps you prefer to be less energetic?

想要小一点？

And the more you do, the better.

越大，好处越多。

The universe itself has its own momentum, its own energy.

宇宙拥有自己的、能。

How much exercise do I really need to do?

我究竟需要多大的？

As it did, angular momentum became important.

随着它的坍缩，角变得重要起。

An important thing to know is the impulsive momentum relationship.

重要的是要知道脉冲的关系。

And it's important to get the right dose of activity.

掌握合适的也很重要。

But the original star's angular momentum is preserved.

但原始恒星的角被保留了下。

How many of you in the last month have exercised less than you think you should?

们多少人上个月没有达标？

In terms of building muscle, volume is the ultimate factor dictating growth.

就增肌而言，是肌肉增长的根本因素。

That's called conservation of angular momentum.

这称为「角守恒定律」。

It's about physics and momentum rather than a strike.

它是关于物理、，而不是击倒对方。

Study subjects were grouped according to the amount of activity they reported.

根据研究对象的活将其进行分组。

Or maybe that the level of physical activity just isn't the best idea.

者也增加并不是什么好主意。

An easy way to think about this is it's called momentum transfer.

一个简单的理解方法，这是传递的结果。

What's neat is that they can maintain angular momentum indefinitely.

最酷的是它可以永久性地保持角。

That decreased activity corresponded with roadblocks to speech delivery.

这种活减少与说话时的障碍相对应。

You might have to cut down on the amount of exercise or sport you do.

可能不得不减少的体育活。

You can get the motion down and then it puts less strain on your back.

可以减少，这样可以减少对背部的压力。