Overexposure to ultraviolet ( UV) radiation, such as from sunlight, tanning booths, or sunlamps.
过度暴露于紫外线（UV）辐射下，如阳光，晒黑机，或日光灯。
2
These are prime hours for exposure to skin-damaging ultraviolet (UV) radiation from the sun, even on overcast days.
这段时间是皮肤受到太阳紫外线照射伤害的主要时段，即使是阴天也是如此。
3
The massive loss of protection against the sun's ultraviolet (UV) radiation would likely force humans into a vampire-style existence of staying indoors during daylight hours.