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biology 生物 a substance such as vitamin C or E that removes dangerous molecules, etc., such as free radicals from the body 抗氧剂（如维生素 C 或 E，可消除体内的有害分子等，如消除自由基） - (
chemistry 化学 a substance that helps prevent oxidation, especially one used to help prevent stored food products from going bad （尤用于食物保鲜的）抗氧化剂