1) worsen water quality
水质劣化
2) poor quality water
劣质水
1.
Status and prospects of high-efficient and safe utilization of poor quality water for agriculture;
劣质水农业高效安全利用技术的研究现状及其展望
4) deterioration
[英][di,tiriə'reiʃən] [美][dɪ,tɪrɪə'reʃən]
劣质化
1.
The operational problems brought by deterioration of ethylene material on plant operation applicability were analyzed,including regress of economic indexes as integrated energy consumption of ethylene,yield of diene,corrosion and breakout of welding line in cracking furnace tube,layer phenomenon in quenching oil,operation fluctuation of alkaline tower,and so on.
分析了乙烯原料劣质化对装置运行适应性带来的几个操作问题,主要有:乙烯综合能耗、双烯收率等技术经济指标下滑,裂解炉炉管焊缝腐蚀穿漏,急冷油出现分层现象,碱洗塔操作波动等。
2.
In this study, the effect of base oils characteristics on ATF performance is investigated, mainly regarding differences in frictional characteristics with deterioration.
本项研究工作主要针对摩擦特性随油品劣质化而发生的变化差别,考察了基础油的特性对ATF性能的影响。
6) marginal water irrigation
劣质水灌溉
1.
Effect of marginal water irrigation on soil salinity, sodicity and crop yield;
劣质水灌溉对土壤盐碱化及作物产量的影响
补充资料：地下水水质测定(见水质测验)
地下水水质测定(见水质测验)
dixiashui shulzhi eeding地下水水质测定见水质测验。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条