grain screenings的用法和樣例：
例句
- Our production brigade has set aside ample reserve grain.
我們生產大隊已經留出了充足的儲備糧。 - Agriculture appears to be doing comparatively well, but the per-capita grain yield is only 304.5 kilogrammes, grain reserves are small and the income of the peasants is pretty low.
農業還比較好一點，但是，糧食產量按全國人口平均每人只有六百零九斤，儲備糧也不多，農民的收入就那麼一點。
