But it has three dimensions when it comes to symmetries.A sphere canspin on an axis that runs, say, from north to south, or on each of two axesplaced at right angles to this.

• 但当它具有对称性的时候它就了三个维度，球面可以在它所处的坐标下进行旋转，比如从北向南的旋转，或者（此处未译）。