Turning, he saw the top of Professor Flitwick's head moving between the desks a short distance away.

他转过身，看到弗立维教授的头顶正在不远处的桌子间移动。

The voice made Harry jump. Turning, he saw the top of Professor Flitwick's head moving between the desks a short distance away.

这个声音吓了哈利一跳。他转过身，看到弗立维教授的头顶正在不远处的桌子间移动。

But even though it seems like you're moving differently, you both end up moving the same distance in the same direction following the same vector.

但是，尽管看起来你们的移动方式不同，但你们最终都会沿着相同的矢量向相同的方向移动相同的距离。