loess conservation

例句：

1. 1. The government has implemented a policy to loess conservation.
   政府已经实施了一个政策来黄土保持。
2. 2. The soil erosion is a major problem in the region, and loess conservation is essential.
   该地区的土壤侵蚀是一个主要问题，黄土保持是至关重要的。
3. 3. The loess conservation project aims to protect the fragile ecosystems in the area.
   黄土保持项目旨在保护该地区脆弱的生态系统。