cost per mu

例句：

1. 1. The cost per mu of the new irrigation system is significantly lower than that of the old one.
   新灌溉系统的每亩成本显著低于旧的。
2. 2. The farmers have to calculate the cost per mu for their crops to decide whether to plant or not.
   农民必须计算每亩作物的成本来决定是否种植。
3. 3. The cost per mu for building a house in this area has increased significantly in recent years.
   近年来，该地区建造房屋的每亩成本显著增加。