Ultraviolet (UV) rays emitted by the sun are the leading environmental cause of skin complaints, premature ageing, sun burn and even skin cancer.

太阳放射出的紫外线是引起皮肤过早老化、皮肤晒伤甚至皮肤癌等问题的主要环境因素。

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If you have to go outdoors during the peak daylight hours, wear protective clothing and sunscreen that will protect you from harmful ultraviolet (UV) rays.

如果你必须在这个时间段外出的话，就要穿防护服和擦发晒霜，这样能使你避免有害紫外线的照射。

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When bombarded with ultraviolet rays from the sun, the lettuce leaf creates UV-absorbing polyphenolic compounds in its outer layer of cells.

当来自太阳的紫外线轰击到莴笋时，莴笋叶子就会在外层细胞创造吸收紫外线的多酚类物质。

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The idea that ultraviolet (UV) rays can inactivate viruses is not new, but this is the first time that such firm conclusions have been made in connection with the varicella-zoster virus, the herpes virus responsible for chickenpox and shingles.

FORBES: Sun's UV Rays May Prevent Chickenpox