如果你有表面发光的物体，就可以做一个信号装置。

You can make a signal device if you have something with shiny surface.

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这个弧形主要是由多环芳烃的有机物构成的在云的表面发光。

This arc is made up primarily of organic compounds called polycyclic aromatic hydrocarbons, which glow on the surface of the cloud.

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固体表面发光技术是一种灵敏的分析技术，对于环境样品中痕量有毒有机污染物的分析十分有用。

Solid surface luminescence is a sensitive analytical technique which is very useful for the analysis of trace poisonous organic pollutants in environmental samples.

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And, when zinc sulfide is hit by particles or by anything, by radiation or by particles of greater than a certain critical energy, there is a glow.

当粒子或其他东西,通过辐射或粒子的方式，并且能量高于临界值,撞击到硫化锌的表面上的时候，就会发光。

麻省理工公开课 - 固态化学导论课程节选