以下为句子列表：
英文: A suntan, she explained, was a defensive skin reaction to produce more of the pigment melanin to protect itself from too much harmful ultraviolet (UV) radiation.
中文: 她解释说晒黑是皮肤的一种防御反应，皮肤为了保护自己免受过多的有害的紫外线的照射产生更多的黑色素。
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英文: At present extensive use clean method is ultraviolet (UV) light clean,on one hand it can avoid pollution because of use organic solvent , meanwhile can abbreviate clean process .
中文: 目前国外广泛使用的清洗方法是紫外(UV)光清洗，它一方面能避免由于使用有机溶剂造成的污染，同时能够将清洗过程缩短。
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英文: Of particular concern is the sun's high-energy ultraviolet (UV) light, which breaks the bonds that hold together the carbon atoms of organic molecules.
中文: 其中，太阳所放射的高能紫外光，格外引人关切，它会切断有机分子中碳原子彼此连接的化学键。
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英文: Our exclusive ultraviolet (UV) lamp design destroys more than 99.9% of waterborne microorganisms, and you will enjoy fresh taste of treated water without boiling.
中文: 紫外光灯管，确保灭除99.9%以上可能存在于水中的有害细菌或病毒，净水还可不经烹煮即时饮用。
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英文: Recent epidemiological and physiological evidence suggests to us that the worldwide pattern of human skin color is the product of natural selection acting to regulate the effects of the sun's ultraviolet (UV) radiation on key nutrients crucial to reproduc
中文: 最新的流行病学与生理学证据，令我们想到：人类肤色的全球分布模式是天择的产物，因为阳光中的紫外线辐射会影响某些营养素，而那些营养素是生殖成就的关键。
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