For instance, plastics have a known weakness to ultraviolet rays from the sun, and so long exposure might represent an issue.
例如，塑料有一个缺陷，不能长期暴露于太阳紫外线的照射中。
Researchers believe that these growths are caused in part by long-term exposure to the ultraviolet rays contained in sunlight.
研究者们认为，造成这种增生的一部分原因是长期地暴露于阳光中的紫外线下。
Too much exposure to the sun's ultraviolet rays can cause skin cancer.
过多的太阳紫外线照射可能导致皮肤癌。
The resistance of the color on dials to ultraviolet rays is tested by placing them under a projector which simulates a 365-day exposure to sunlight within just 72 hours.
将表盘置于紫外线投射器下72小时，模拟相当于365天的日光辐射量的照射，以检测表盘颜色抗紫外线的阻力。
As it is well known, the ultraviolet rays can be widely applied to disinfection, physical treatment, detdctive discrimination and exposure optical carving etc.
紫外线的应用很广泛，如紫外线杀菌消毒，紫外线理疗，紫外线荧光分析和鉴别侦破，紫外线曝光光刻等。
Leading dermatologists and photobiologists warn that daily exposure to ultraviolet rays means the skin can age more than twice as quickly as skin that is protected.
有名皮肤病学家以及光生物学家警告人们，常常暴露于紫外线下意味着皮肤的老化速度比被保护时要快两倍。
Leading dermatologists and photobiologists warn that daily exposure to ultraviolet rays means the skin can age more than twice as quickly as skin that is protected.
有名皮肤病学家以及光生物学家警告人们，常常暴露于紫外线下意味着皮肤的老化速度比被保护时要快两倍。
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