Objective To investigate the preventive effect of quercetin on DNA damage in human epidermoid carcinoma cells induced by ultraviolet a (UVA).

目的观察长波紫外线引起人表皮癌细胞DNA链断裂损伤的情况，以及槲皮素对这种损伤的预防作用。

youdao

Narrow-band ultraviolet B (UVB) has better overall repigmentation rates and safety profile than either topical or oral psoralens and ultraviolet A (PUVA).

比起局部用补骨脂素或口服后再照UVA，窄谱紫外线有较好的恢复色素的效果和安全性。

youdao

This product USES the latest scientific formula, a long continuous sunscreen sunscreen, ultraviolet a wave of strong segregation, B wave, avoid UV damage, improving dry skin, tan, red, oxidation.

本品采用最新科学配方，长时间防晒持续防晒，强力隔离紫外线A波、B波，避免紫外线伤害，改善肌肤干燥，晒黑，发红，氧化现象。

youdao

The system is equipped with an ultraviolet lamp and a halogen lamp that produces near-infrared light.

VOA: special.2011.06.07

If you get some of these in the upper atmosphere, a photon, an ultraviolet photon, has the energy capable of breaking this bond.

如果你把它放到大气层上，一个光子，一个紫外光光子，有能量可以破坏它的化学键。

麻省理工公开课 - 固态化学导论课程节选

Ultraviolet light from the sun changes a substance in the skin into vitamin D.

VOA: special.2009.04.21

Still need a reason to give UltraViolet a try?

ENGADGET

The two-disc set available for purchase also includes a digital copy of the film and will be enabled with UltraViolet, a new way to collect, access and enjoy movies.

ENGADGET: Top Gun Blu-ray 3D details revealed, comes home February 19th after IMAX 3D run

But a product's SPF indicates only its ability to defend against sunburn-causing ultraviolet-B rays and not against ultraviolet-A, which penetrate deeper into the skin and cause premature aging. (Both types contribute to skin cancer.) For example, a person wearing SPF 50 could spend considerable time in the sun without getting burned.

WSJ: The Myths of Daily Sunscreen