Everybody follow that?

大家都听懂了吗
That's another example where the center of mass doesn't move.

这就是另一个利用质心不会移动的例子
Now, let's ask what happens next.

现在我们来研究接下来的过程
So, you leap in the air, okay?

你跳到空中是吧
Now you're airborne.

你现在在空中
What do you think is happening when you're airborne?

当你在空中时将会发生什么呢
Yes? Go ahead! What's happening?

请说接着说将会发生什么
It'll be moving, and why do you say it'll be moving?

它将移动为什么你认为它会移动
Yeah.

是的
Right, there's one way to say that.

是的这是一种解释
The center of mass cannot move,

质心不能移动
so if you move to the left, the boat will move to the right.

所以假如你向左移动船就会向右移动