Some movements involving primarily vertical or horizontal motions of the body as a whole, in which rotations can be ignored, can be studied using simple equations of linear motion in threedimensions.
有些运动主要涉及整体的垂直或水平运动，其中转动可以忽略，可以用三维线性运动的简单方程来研究。
2
With threedimensions, you can see why it is called a cube.
使用三个维度，您就会明白为什么要将其称为多维数据集。
3
So far, we have represented threedimensions of information explicitly.