次级作物的共同特点是种植在那些缺乏灌溉而靠天下雨的地势较高的地区。
Common conditions for secondary crops are upland areas dependent on rainfall due to a lack of irrigation
次级作物的共同特点是种植在那些缺乏灌溉而靠天下雨的地势较高的地区。
Common conditions for secondary crops are upland areas dependent on rainfall due to a lack of irrigation