The second group did not. But some medical researchers refused to accept that a poor diet caused pellagra.

VOA: special.2010.05.18

By this we mean poor diet and physical activity and obesity, but history offers a depressing picture.

在这个问题中我们是指不良饮食,缺乏运动和肥胖,但历史情况不容乐观

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选