对研究区地下水污染现状，提出了地下水安全供水对策。
Countermeasures of safety groundwater supply are put foward based on groundwater pollution status in research area in this paper.
本文分析了我国城市供水存在的主要问题，并以开源节流加强保护为原则提出了安全保障对策。
This paper discusses the problem of our urban water supply and suggests some guarantee countermeasures based on exploring new water resources, saving water and enhancing protection.
本文分析了我国城市供水存在的主要问题，并以开源节流加强保护为原则提出了安全保障对策。
Study on present situation and conservation strategies for the endangered species, Sinopodophyllum emodi in Liupan Mountain of Ningxia;
本文分析了我国城市供水存在的主要问题，并以开源节流加强保护为原则提出了安全保障对策。
Study on present situation and conservation strategies for the endangered species, Sinopodophyllum emodi in Liupan Mountain of Ningxia;
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