【摘要】 饮水中某些无机或矿物成分与发病率和死亡率的增高有关， 这些成分常与饮用水的硬度有联系， 并且天然存在于水中，或者在水处理厂与配水系统中。在美国和其它发达国家， 许多慢性病的发病率尤其是心血管疾病与水的硬度呈逆相关。其机理目前尚不明。文中给出了几种假设理论， 并对研究中存在的问题进行了探讨。更多还原

【Abstract】 The contents of inorganic or mineral components in drinking water are associated with the incidences of diseases and death rate.These components are related to the hardness of water and exist in nature.Sometimes,these components also originate from water treatment systems.The rate of many chronic diseases,especially the diseases harming the heart and blood vessel is inverse to the hardness of water in U S A and other developed countries.So far,the mechanism of these phenomena is not clear.Several hypotheses have been given in this thesis and the problems discovered by studying are discussed in detail.更多还原