Through long-term monitoring of the change of the chemical composition of groundwater, a new kind of premonitory information for earthquake prediction may be provided.
通过长期监测地下水中水化学成分的变化，就有可能为预测预报地震提供一种新的前兆信息。
The chemical composition of groundwater in the transition zone is not a simple mixture of local fresh water and sea water, in which the canon-exchange played an important role.
过渡带地下水化学成分不是淡水和海水的简单混合，阳离子交换在其中起了重要作用。
The paper investigated the present situation of groundwater pollution of Fushun city. The results indicated that:the chemical composition of groundwater of Fushun city can be divided into 7 types.
前言： 对抚顺市区地下水水质污染现状进行调查，结果表明：抚顺市地下水水化学分为7个类型。
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