fen soil

例句：

1. 2.
   用于比喻
2. 3.
   在农业中
3. 1. The farmer used to use this kind of fen for his crops.
   这位农民过去用这种粪肥来种植他的作物。
4. 2. He was so proud of his son's achievements that he gave him a fen as areward.
   他为儿子的成就感到非常骄傲，因此给了他一份粪肥作为奖励。
5. 3. The farmer applied the fen to the soil before planting the seeds.
   在播种之前，农民将粪肥施于土壤中。