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

一个简单的理解方法，这是动量传递的结果。

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

瓦拉纳西：一种简单的思考方式是将其称为动量传递。

So now we can use all of the momentum transfer data, so we can figure out how big that spacecraft needs to be, how fast it needs to go, compared to whatever asteroid is coming our way.

现在我们可以使用所有的动量传输数据，这样我们就可以算出与任何小行星相比宇宙飞船需要多大，它需要走多快。