The reason for this structure of glass is that the viscosity of glass changes too fast with temperature, and the crystallization rate is too slow. When the temperature drops and the crystal just begins, the viscosity has become very large, and the movement of the atoms is limited, resulting in this result. Therefore, the glassy state resembles a solid liquid, and the atoms in the material are always in the process of crystallization.
Therefore, the position of the atoms in the glass appears to be fixed, but there is still a force among the atoms that promotes rearrangement. It is not a stable state. This is different from the state of atoms in paraffin. Therefore, the same is not crystal, at room temperature, paraffin is completely solid, and glass can be seen as a very viscous liquid.
