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Questions about geometric configuration (ask the master of mathematics)
Two atoms ... are lines ... which is 2D. ...

Three atoms ... are the surface ... which is 3D. ...

And four atoms ... that's 4D. ...

Einstein once proposed a 4D image. ...

In the theory of relativity ....

4D only exists in the universe. ....

At present, it is just a theory. ....

There's no way to prove it ...