It's advisable to remove the nettles when the water goes slightly green, otherwise the tea can become too bitter.
不过最好在茶水变得稍绿时将叶片取出，否则这杯茶会很苦的。
Do you need any extra time to replace coffee with green tea, or soft drinks with water?
你需要额外的时间去把咖啡换成绿茶，软饮料换成纯净水吗？
The researchers gave 14 healthy volunteers either green tea, diluted caffeine or hot water and then measured the function of endothelial cells lining the circulatory system.
研究人员让14名身体健康的志愿者分别饮用绿茶、稀释的咖啡和热水，然后对他们的循环系统内皮细胞的机能进行检测。
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