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

So are we having an epidemic of poor diet and what can be done about that?

那么不良饮食也在流行,我们能做些什么

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Type II Diabetes usually has its onset in adulthood-- that's beginning to change-- and is usually created by lifestyle factors: poor diet, physical inactivity, and obesity.

型糖尿病多见于成人,情况现在开始改变,这种病通常由不良生活方式引起,不良的饮食,锻炼的缺乏以及肥胖

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

And when he said they he's talking about diseases related to poor diet.

当他说他们,他讲到与不良饮食有关的疾病时

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选