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。
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。
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；
My campus front door has the name of mother school on the door with a southern exposure, in the sun flickering give out light.
我的校园朝南方向的大门上有我母校的名字，在阳光下闪闪发光。
The ultraviolet light in sunlight also suppresses the skin's immune system, which may be why lots of early-life sun exposure is associated with earlier melanoma skin cancers.
阳光中的紫外线还会对皮肤的免疫系统造成压力，这可能就是为什么，许多儿时的太阳暴晒会造成小儿黑色素皮肤癌。
The ultraviolet light in sunlight also suppresses the skin's immune system, which may be why lots of early-life sun exposure is associated with earlier melanoma skin cancers.
阳光中的紫外线还会对皮肤的免疫系统造成压力，这可能就是为什么，许多儿时的太阳暴晒会造成小儿黑色素皮肤癌。
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