UVB辐射可诱导机体产生活性氧自由基，从而引起细胞生物学改变，导致基因突变、致癌和细胞死亡。
UVB irradiation can induce the formation of reactive oxygen species (ROS), and induce the change of cell biology, gene mutation, carcinogenesis and cell death.
许多研究已经证明，机体的正常代谢可以产生活性氧自由基，它有很强的氧化性，是机体产生疾病和衰老的关键之一。
Many studies have shown that the normal metabolism of the body can produce reactive oxygen species (ROS), which has strong oxidation, is the key of human diseases and aging.
许多研究已经证明，机体的正常代谢可以产生活性氧自由基，它有很强的氧化性，是机体产生疾病和衰老的关键之一。
Many studies have shown that the normal metabolism of the body can produce reactive oxygen species (ROS), which has strong oxidation, is the key of human diseases and aging.
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