You've probably already noticed that there's some material that's set aside from the text in boxes, and I encourage you to particularly look at those boxes for this chapter.

你们可能已经注意到,在正文旁边的方框里有一些材料,我希望你们仔细看看方框中的内容

耶鲁公开课 - 生物医学工程探索课程节选

You figure that most of those boxes are being eaten by somebody or another, there's some waste that you might calculate in, but there--error gets introduced there trying to estimate that, so you get a number on that.

你的计算中大部分食品,都被人们吃了,浪费的那些也要计算进来,但其中的误差,也要估算出来,最后得出一个数字

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选