The paper systematically studied the benefits of soil and water conservation on 4 different models of compound eco-agriculture on dryslope land.
对元谋干热河谷区4种旱坡地生态农业模式的水土保持效益进行了系统的研究。
2
When the Banks of the Dry River were low and the ground was less steep, he turned toward the way they had come, the long, formless slope that led up into the dark.