请英语高手帮我想想如何换种方式表达这句话的意思.

题目

请英语高手帮我想想如何换种方式表达这句话的意思.
raw grains and other ingredients used for cooking traditional dishes..they are a source of extra calories because much of their nutrient value is taken out,and their "caloric density"rises when crops are grown in big farms and processed en masse.

答案

raw grains and other ingredients used for cooking traditional dishes are a source of extra calories whose most nutrient value is drawn out while their "caloric density"rises when crops are grown in bi...