他们建议，孕妇每天最多只能喝四杯咖啡，或六杯茶。
Pregnant women are advised against drinking more than four cups of coffee a day - or six cups of tea.
现在，公共健康专家仍然鼓励人们每天吃推荐的二到六杯半果蔬汁。
For now, public health experts continue urge people to eat the recommended two to six and a half cups of fruits and vegetables a day.
哈佛研究员说，女人一周喝三到六杯酒会增加15%患乳腺癌的几率。
Drinking as few as three to six glasses of wine a week may increase a woman's risk of breast cancer by 15%, Harvard researchers say.
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