哈佛公共健康学院的沃尔特·威利特博士说，从本质上说，久坐不动的生活方式和丰富的食品，已经把人变成相当于关在圈里喂玉米的牛。

In essence, says Dr. Walter Willett ofthe Harvard School of Public Health, sedentary lifestyles and acornucopia of food have transformed people into the equivalent ofcorn-fed cattle confined in pens.

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沃尔特·威利特(Walter Willett)是哈佛大学一位营养学研究人员，也是这项研究的合著者。

Walter Willett is a nutrition researcher at Harvard and co-author of the study.

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