Aging and exposure to sunlight can cause cataracts.

衰老和日光照射可引起白内障。

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Sunlight is the best source of vitamin D, but exposure to sunlight can also raise the risk of skin cancer.

阳光是人体合成维生素D的最好方式，但曝露在阳光下同时也会增加皮肤癌风险。

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Sleep experts recommend 30 minutes of exposure to sunlight a day because daylight helps regulate our sleep patterns.

睡眠专家建议每天30分钟的日照时间，因为阳光帮助你调节我们的睡眠模式。

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Vitamin D is manufactured in the skin on exposure to sunlight and people make significantly less in area where there is less daylight.

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Certain OLED materials also are damaged by prolonged exposure to sunlight.

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Vitamin D levels, which play a role in the body's immune response and vary with exposure to sunlight, make latitude of residence a possible risk factor.

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