这种情况发生的原因是身体机能接触氧后产生的副产物自由基的释放，自由基是一类具有高活性的分子，对人体具有巨大的威胁。
This happens because of exposure to free radicals, highly reactive molecules that are byproducts of bodily functions involving oxygen (which is just about all of them).
氧化损伤，或氧化应激，出现在被称为自由基的高活性分子攻击和破坏细胞蛋白质，脂类(脂肪)和脱氧核糖核酸时。
Oxidant injury, or oxidative stress, occurs when highly reactive molecules called free radicals attack and damage cellular proteins, lipids (fats) and DNA.
化学活性高的自由基可使不饱和脂肪酸过度氧化，使细胞功能突变或衰退，引起组织增殖和坏死而产生置人于死地的疾病。
Chemistry high activity of free radicals can make the unsaturated fatty acid oxidation, making the cell function excessively, or recession mutations and proliferation and necrosis centralis disease.
这些植物素是具高度活性的，可以中和自由基或一些连续的生物反应，例如高活性的氧气和生物大分子。
These phytochemicals are highly reactive with other compounds, such as reactive oxygen species and biologic macromolecules, to neutralize free radicals or initiate biological effects.
抗氧化剂可对抗自由基，自由基是高活性的原子或分子，可损伤细胞中的DNA和其它重要分子。
Antioxidants protect against free radicals, highly reactive atoms and molecules that can damage DNA and other important molecules in the cell.
由于自由基活性高、半衰期短，其研究方法呈现多样化的特点。
Usually free radical has better activity and shorter half life, hence there have many methods for us to study free radical.
自由基是一种高活性分子，极易与人体细胞相结合，破坏人体细胞，被认为是产生疾病和癌症的主要原因。
Free radicals are highly reactive molecules that bind to and destroy body cells, and are considered to be the main cause of disease and aging.
自由基是一种高活性分子，极易与人体细胞相结合，破坏人体细胞，被认为是产生疾病和癌症的主要原因。
Free radicals are highly reactive molecules that bind to and destroy body cells, and are considered to be the main cause of disease and aging.
应用推荐