You could say the position vector at another time, or at any time, but in fact, what's also true is that the velocity vector is in the plane.

你可以说，位置矢量在另一个时间或在任何时间，无论如何，位置矢量始终在这个平面上。

youdao

You could say the position vector at another time, or at any time, but in fact, what's also true is that the velocity vector is in the plane.

你可以说，位置矢量在另一个时间或在任何时间，无论如何，位置矢量始终在这个平面上。

youdao