The skin manufactures vitamin D in response to ultraviolet light exposure.

皮肤暴露于紫外线可生成维生素D。

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Exposure to ultraviolet light is closely linked to skin cancer.

受紫外线照射与皮肤癌紧密相关。

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Studies have shown that high lifetime exposure to ultraviolet light, as in those whose occupations result in regular exposure to sunlight, leads to an increased chance of developing cataracts. 1.

相关研究显示，对于那些经常在户外工作的人们来说，这样长时间地暴露于紫外线直接导致了患白内障风险的增加。

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Ultraviolet-light exposure potentially causes melanoma and contributes to the development of cataracts.

WSJ: The Crucial Years for Protecting Your Eye Health

Vitamin D is a fat soluble vitamin that is mainly produced by exposure of the skin to ultraviolet light.

CNN: How much vitamin D do I need?