You can boil these herbs twice. Use four cups of water the first time, and boil until there is one cup of liquid left.

这包药可以煮两次，第一次加四碗水，用小火煮到剩一碗药水。

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To keep aphids off of plants add four cups water, four teaspoons of dishwashing liquid and four teaspoons vodka in a large spray bottle.

为了除去植物上的蚜虫，按如下方法配制杀虫剂：准备一个大喷雾器，加入四杯水、四勺洗洁精和四勺伏特加，摇匀。

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Sarah Schenker, a dietician for the British Nutrition Foundation, said there was nothing wrong with people drinking three or four cups of coffee a day - provided that they also drank water or other decaffeinated drinks to compensate.

BBC: Caffeine 'reduces productivity'