glimmer
ray
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fluorescence
fluorescent
In Taiwan, this is usually written as 萤光.
这 支 笔 有 荧光 墨水。
This pen has fluorescent ink.
萤火虫 的 身体 发 出 了 荧光。
The firefly's body emits fluorescence.
这 件 衣服 有 荧光 效果。
This piece of clothing has a fluorescent effect.