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。
The main chemical composition of the mineral water verified the geological structure of groundwater storage and the condition of deep water cycle.
矿泉水的主要化学成分验证了矿水床的蓄水构造和深循环条件。
Extensive mining progress caused considerable changes in both groundwater circulation and groundwater chemical composition of the aquifer.
大量的开矿过程对含水层中的地下水循环和化学成分都造成了可观的变化。
The variation of gas composition and content in groundwater can cause a series of physical and chemical reaction, as an important reason, it produces the anomalies of underground fluid.
地下水中气体成分及含量的变化，可以引起一系列的物理、化学反应，是产生流体宏观异常的一个重要原因。
The variation of gas composition and content in groundwater can cause a series of physical and chemical reaction, as an important reason, it produces the anomalies of underground fluid.
地下水中气体成分及含量的变化，可以引起一系列的物理、化学反应，是产生流体宏观异常的一个重要原因。
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