marketable grain的用法和樣例：
例句
- JilinProvince, with advantaged agricultural producing conditions, is an important commodity grain production base in China.
林省農業(yè)生產(chǎn)條件得天獨厚，是中國重要的商品糧生產(chǎn)基地。 - Agriculture from the past, inadequate food consumption rose for the commodity grain base counties.
農業(yè)由過(guò)去的糧食不敷消費一躍而為商品糧基地縣。
