总起来说，听从旨在降低饮食脂肪、似乎可靠的建议三十年后，美国人比以往更胖。

After 30 years of seemingly solid advice aimed at lowering dietary fat, Americans have grown collectively fatter than ever.

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而美国2005年饮食指南建议学校只提供含人工添加剂低于百分之一或者脱脂的乳制品。因为即使是乳制品也会由于加糖变得不健康。

And the 2005 Dietary Guidelines for Americans recommends that schools offer only unflavored 1-percent or nonfat milk because even milk can be unhealthy if it's loaded with sugar.

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美国人需要进行一个以更多植物为主的饮食，富含水果和蔬菜，按照最近一个报道建议更新联邦膳食指南。

Americans need to adopt a more plant-based diet, rich in fruits and vegetables, according to a recent report that proposed updates to federal dietary guidelines.

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The food guide pyramid was the government's effort, put through by the U.S. Department of Agriculture about what people should eat optimally.

食物金字塔是政府努力的结果,它是由美国农业部提出的,关于人们最佳饮食结构的建议

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选