来自《耶鲁大学开放课程：有关食物的心理学、生物学和政治学 第14集 第14集》
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The one is the energy density of the products第一是产品的能量密度 -
and the second is portion size.第二是份量 -
We know from work from Barbara Rolls我们从芭芭拉?罗斯等人的工作中获知 -
and many others that they actually operate independently.他们独立处理这些条件 -
If you do the one without the other, you're in trouble如果处理一个忽略另一个 就会有麻烦 -
because we may very well bring down energy density因为即使能量密度下降了很多 -
and then have these huge packs people simply consume more,如果人们买大包量的来吃 -
and you'll be back to the same--the calorie position摄入的热量是一样的 -
even though they may be healthier calories,即使是健康的热量 -
the total volume may be wrong.总量仍可能存在问题 -
We have quite a concerted effort to include portion size我们将联合其它一些美国公司 -
as an explicit focus of our work, both through a joint initiative共同致力于将明确份量