请英语高手帮忙看看这句话如何改写,(换种方式,但意思不变) raw grains 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.
加工过的粮食相对与未加工的粮食卡路里的比重是大的。 可这样该写:Raw grains are a kind of source of extra calories。As is known , when crops are grown in big farms and processed en masse,much of their nutrient value is taken out ,as a result ,“caloric density” rise。
raw grains are a source of extra calories not only much of their nutrient value can be taken out but also their "caloric density" can rise when crops are grown in big farms and processed en masse.