agricultural melioration 农业土壤改良
soil melioration 土壤改良
hydro-melioration 水利土壤改良
melioration of land 国土改良
eco-melioration 生态化改造
land melioration 土地改良
Melioration Theory 改善理论
The melioration of saline and alkali soils is a difficult topic faced in the world. For long time, in the study filed of saline and alkali soil ecology, the research has been focused on plant physiology and bio-ecology.
盐渍化土壤改良与利用是世界范围内所面临的难题，长期以来在盐渍化土壤生态学研究领域内，人们以实现生物改良与利用为主要目标，开展了许多盐生植物生理生态的科学研究。
参考来源 - 盐渍化极端生态环境条件下土壤微生物生态及放线菌资源The adulteration and melioration experiment of the materials prepared by acid-treating method were studied, the results proved that the material treated had an excellent steady property, but less reversible capacity.
本论文对由酸处理法合成的Li_xMnO_2材料进行了掺杂改性实验，结果表明，改性后的材料虽然循环性能有显著改善，但比容量会有所减少。
参考来源 - 锂离子电池正极材料层状Li·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： amelioration betterment
同义词： improvement
以上来源于: WordNet
N the act or an instance of improving or the state of being improved 改善
Structure vibration control is of great importance for the melioration of spacecraft dynamic property.
结构系统的振动控制是改善航天器动态特性的重要途径。
Results: 1, After treated, The chough, sputum , asthma and asthma sound melioration of the controlled group have prominence (P<0. 01) .
结果：1、治疗组治疗后咳嗽、咯痰、喘息、及哮鸣音均较治疗前有显著改善（P<0.01）；
Dialysis all the groups the melioration of defect severity of clinical neural function, hemorrheology and TCD changes and evaluated its effect and safety.
分析各组临床神经功能缺损程度评分及TCD、血流变的改善情况，评价其疗效及安全性。
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