绿茶富含多元酚类，后者是给予绿茶苦涩味道的植物化学物质，具有强效的抗氧化特性。
Green tea is chock-full of polyphenols, phytochemicals with potent antioxidant properties that give green tea its bitter flavor.
研究表明，棓酰类多元酚可与铝形成络合物，其络合物是铝和棓酰基中苯三酚的邻位二羟基形成的，它是稳定的五员螯合环结构；
It is show that the complexes of galloyl type hydrolysable tannins with aluminum are formed which involve five-member ring stably formed adjacent hydroxyl groups in galloyl to aluminum atoms.
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