unit grain造句

例句与造句

1. income of farm household in major grain producing areas is positively correlated with educational level of farm workers, unit grain yield, seeded area of quality grain varieties, and the investment capacity of farm households, and negatively correlated with work time of farm households
   摘要粮食主产区农户家庭收入与农户家庭劳动力受教育水平、粮食单产、优质粮食品种播种面积、农户家庭投资能力呈正相关，与农户家庭农业劳动时间呈负相关。
2. It's difficult to find unit grain in a sentence. 用unit grain造句挺难的