The polygonal segments of the surface react to ultra-violet light, mapping the position and intensity of solar rays.

其表面的多角形组成部分对紫外光产生反应，映射太阳光线的方位和强度。

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Mark Robinson of Arizona State University, sifted through the data for telltale jumps in the ratio of ultra-violet to visible light.

亚利桑那州立大学的马克-罗宾逊，筛选了由紫外线和可见光的比率所得到的数据而得出这一结论（月球上存有钛矿）。

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They are only visible when they are bathed in ultra-violet light and subjecting them to such constant bombardment would be not only impractical but harmful.

只有当这些壁画沐浴在紫外灯光下时，这些细节之处才得以可见，但将这些传世珍品一直置于紫外灯的狂轰乱炸之下不仅不现实，对壁画本身也有害。

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The action of ultra-violet light from the sun on a molecule called 7-dehydrocholesterol, found in the skin, turns it into the vitamin.

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