subsoil agricultural drain

例句：

1. 1. The farmers areusing this technology to improve the quality of their soil and reduce water pollution.
   农民们正在使用这项技术来改善土壤质量并减少水污染。
2. 2. The subsoil drainage system is crucial for maintaining the health of the soil and preventing erosion.
   土壤下层排水系统对于保持土壤健康和防止侵蚀至关重要。
3. 3. The construction of the subsoil drainage system has significantly improved the agricultural productivity in the region.
   建设土壤下层排水系统极大地提高了该地区的农业生产力。