amelioration
短语词组
- land amelioration 土地改良
- continuous amelioration 持续改进
- grassland amelioration 草地改良
- amelioration design 改进设计
- quality amelioration 质量改进
- amelioration operator 改进算子
- amelioration efficiency 改良效果
- amelioration degree 改善程度
- cultivational amelioration 耕作土壤改良 返回 amelioration