That is the real value of the z dimension: You can create objects in any order you choose and position them relative to each other by adjusting the z value on each object.
这就是 z 值的实际价值：您可以按照任何顺序来创建对象，并可以通过调整每个对象的 z 值来调整彼此之间的相对位置。
I move in Dimension Z; the world goes by somewhere else in another 'slice of things, parallel to me.
我徜徉在零度空间，世界在别处另一种物体中与我平行运行。
Second, the Z dimension can be used to imply navigational connection without requiring additional visual symbols, such as lines or arrows.
第二，z轴方向可以用来暗指不需要额外视觉符号导览的连结，例如直线或箭头。
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