1 . 改善的
amelioration 改善ameliorative改善的ameliorator 改良者
2 . 改土
this experiment investigated the effect of combining application of different ameliorativematerial and fertilizer to the biological yield and quality of alfalfa and Leymus chinensis .本試驗采用不同改土物料與化肥配合施用對人工建植草地苜蓿和羊草生物產量和品質影響進行了研究。
3 . 種改進方法
ameliorativegene structure in gene expression programming ., 基因表達式編程中基因結構的一種改進方法.
4 . 土壤改良的
amelioration 調控, ameliorative土壤改良的, amelioration 防護加固