短語詞組短語Land ecological degradation 土地生態(tài)退化land resource degradation 土地資源退化cultivated land degradation 耕地退化land degradation danger degree 土地退化危險度Land degradation degree 土地退化程度land degradation process 土地退化過程combating the land degradation 土地退化防治Resulting In Land Degradation 造成土地退化LAND DEGRADATION & DEVELOPMENT 土質退化與開發(fā) 返回 land degradation