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the material forms a torus, a doughnut shaped cloud of ions

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the material forms a torus, a doughnut shaped cloud of ions that glow in the ultraviolet. 5094
the material forms a torus, a doughnut shaped cloud of ions that glow in the ultraviolet. 5094
the material forms a torus, a doughnut shaped cloud of ions
这些物质呈现环形,形成了一个发出紫外波段光线的环形离子云.