Researchers at Harvard University found that drinking five cups of black tea a day quadrupled the body's immune defense system after two weeks, probably because of theanine.

哈佛大学的研究人员发现，每天喝五杯红茶，两星期后身体的免疫防御系统会增强四倍，这可能是茶氨酸的功劳。

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The first was told to drink five cups of water; the second to take just five sips.

第一组的对象被要求喝下杯水；第二组则只喝了5小口。

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Researchers found one group seemed to benefit the most: the people who'd been drinking three to five cups of coffee a day in their 40s and 50s.

研究人员发现有一组人群受益最大-每天喝3至5杯咖啡的40多岁和50多岁的人们。

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El Tri were intent on avenging their defeat against Argentina in 2006 but have now bowed out of the last five World Cups at the round of 16 stage.

BBC: Argentina 3-1 Mexico

Europe had been strong favourites going into the event after winning the last three Cups and five of the last six.

BBC: US secure emphatic Ryder Cup win

The nutritionist gave a great review of the drink, which contains less than a fifth of the sodium Gatorade has, more potassium than five regular sports drinks, the antioxidant equivalent of one or two cups of green tea and more vitamins than a serving of blueberries.

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