The sun's ultraviolet rays are responsible for both tanning and burning.

太阳的紫外线是皮肤晒黑和晒伤的原因。

《柯林斯英汉双解大词典》

Heat, too, makes our environments tolerable and some ultraviolet rays penetrate the atmosphere.

热也使我们的环境变得适宜生存，而且一些紫外线会穿透大气层。

youdao

youdao

Ultraviolet,also called U-V,rays cause the skin to burn.

VOA: special.2010.07.06

These tools span much of the electromagnetic spectrum from X-rays to ultraviolet to the infrared - and of course microscopy with visible light.

BBC: Terahertz scanner reveals hidden fresco at Louvre

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

"She's" sticking to a fairly predictable road with pink stitching in the seats, pink tweaks in the dashboard and a windshield that the company says blocks more ultraviolet rays.

CNN: Honda's pitch: She's pretty in pink