So, in principle, you can determine for each one of those stars the velocity in orbit, the radius of their orbit and, of course, the period of the binary system.
所以从原则上来说，你们可以决定任何,恒星在轨道中的速度，轨道的半径以及，当然，二元体系的周期。
2
That means when I drop an apple — - and I'm going to drop another one today — that the velocity increases with time.
这也就是说，当我让苹果落下时……，…今天又得摔一个苹果-，它的速度会渐渐增加。
3
This is the velocity that is predicted by the one story.