It shows in these parts of the pyramid that run vertically rather than horizontally, how much people should be eating of various foods.

这个金字塔的组成部分,是垂直排列的,而非以往的水平排列,它们代表了人体对每种食物的需求量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选