Exposure to the morning sun is best for synchronizing the body’s clock with the Earth’s natural 24-hour cycle of light and dark.

沐浴在晨光中是使生物钟与地球的昼夜同步的最佳方法。

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One of the established risk factors for melanoma is UV light, so both exposure to sun and exposure to tanning beds are probably risk factors.

黑色素瘤确定的危险因子之一是紫外线，所以暴露于日光或日光浴床很可能都是危险因素。

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With the time of being in the army and cumulative sun-exposure period, the prevalence of tanning, photoaging and polymorphous light eruption increased, while the prevalence of sunburn decreased.

晒黑、多形性日光疹和光老化患病率随着执勤官兵高原入伍时间延长而增高，随着累积日照时数增多而增高；

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Light therapy (such as from exposure to the sun or another bright light) may also help get you back on track.

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Nantucket red, for example, has the look of a red shirt that has been washed countless times and is faded to a light peachy pink from years of sun exposure, he says.

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