precornu

例句：

1. 1. The farmer used to grow pre-corn for his livestock.
   这位农民过去种植过预玉米供他的牲畜食用。
2. 2. Pre-corn is a type of grain that is harvested before the main crop.
   预玉米是一种在主要作物收获前收割的谷物类型。
3. 3. In some regions, pre-corn is considered a staple food due to its nutritional value.
   在一些地区，由于其营养价值，预玉米被视为主食。