黑色素同时也是一种抗氧化剂，能保护身体对抗活性氧簇，一种可以损害dna的有害成分。
Melanin is also an antioxidant that can protect the body against reactive oxygen species, harmful compounds that can damage DNA.
汉森的研究小组发现当皮肤处在紫外线辐射之下，三种广泛用于防晒产品中的紫外线过滤成分也会生成活性氧簇ros。
Hanson's research team found that three UV filters widely used in sunscreens generate ROS when skin is exposed to UV radiation.
过硼酸钠(SPB)是一种良好的漂白剂，但需在较高温度下才能释放出活性氧。
Sodium perborate (SPB) is one of the excellent bleaching agents. But it releases active oxygen only in high temperature washing liquor.
某些天然产物可清除活性氧，因此不难发现，但因为它是一种平衡行为，所以既不好也不坏，两种情况均有可能。
Some natural products scavenge reactive oxygen so it is not hard to find but because it is a balancing act, it is neither good nor bad. It has the potential to be both.
赭曲毒素A通过诱导DNA链的断裂、姐妹染色单体的互换、DNA加合物的形成或者活性氧发挥作用，但是作为一种毒素其作用机制仍然没有被解决。
Ochratoxin a may act by induction of DNA strand breaks, sister chromatid exchanges, DNA adduct formation, or reactive oxygen but the mechanism of action as a toxin is not yet resolved.
结论：大黄能清除O2、H2O2和其它活性氧，抑制脂质过氧化，是一种有效的抗氧化剂。
CONCLUSION: Rhubarb can scavenge active oxygen including O2 and H2O2. Rhubarb can inhibit lipid peroxidation too. It is an effective antioxidant.
平常，他们研究一种叫做活性氧的分子。
Rather, they were studying a groups of molecules called reactive oxygen species, or ROS.
平常，他们研究一种叫做活性氧的分子。
Rather, they were studying a groups of molecules called reactive oxygen species, or ROS.
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