环形光源。
Or there might be black rings, which would simply be ring-shaped.
或者可能是黑色的吊环，也可能仅仅是环形。
The upper part has a generally ring-shaped upper end surrounding a non-conductive central region.
第一上方部 分具有为环形的顶终端，其环绕非导体的中心区域。
The upper part has a generally ring-shaped upper end surrounding a non-conductive central region.
第一上方部 分具有为环形的顶终端，其环绕非导体的中心区域。
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