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The catechin, ursolic were determined by HPLC.The polysaccharide and tannide were determined by sulphoacid-phenol and complexometric titration methods respectively.

用HPLC法测定儿茶素和熊，-法测定多糖，络合滴定法测定鞣质的含量。

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Green tea contains both caffeine and an organic compound known as catechin.

包含咖啡因和一种作酸的有机化合物。

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And catechins inhibit the action of lipases, which gives them a minor fat blocking effect.

而素则会抑脂肪酶运动，从而产生微弱的脂肪阻隔作用。

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And green tea contains beneficial polyphenols called catechins, which may help protect skin from sun damage and skin cancer, according to preliminary research.

含有一种素的有益多酚， 根据初步研究，可能有助于保护皮肤免受阳光伤害和皮肤癌。

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