long day crop

例句：

1. 1. Longdays and short nights are typical for thisregion.
   长日短夜是该地区的典型特征。
2. 2. The long-day crop is akey factor in the agricultural calendar.
   长日作物是农业日历中的关键因素。
3. 3. Farmers often plant crops that can withstandthe long days of summer.
   农民经常种植能够耐受夏季漫长白天的作物。