“谷物的”用英语怎么说？

这种甲虫主要吃谷物的胚芽.This beetle eats mainly the germ of the grain.我们用气相层析法来测定各种谷物的水分.We use gas chromatography for moisture determination in a number of grains.全国各地牧场对套种谷物的选择都不相同.Farmers'preferences for a companion cereal ...