例句與造句

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
   摘要糧食主產(chǎn)區(qū)農(nóng)戶家庭收入與農(nóng)戶家庭勞動力受教育水平、糧食單產(chǎn)、優(yōu)質(zhì)糧食品種播種面積、農(nóng)戶家庭投資能力呈正相關(guān)，與農(nóng)戶家庭農(nóng)業(yè)勞動時間呈負(fù)相關(guān)。
2. It's difficult to find unit grain in a sentence. 用unit grain造句挺難的