英语语法分析

The subject matter was subdivided into geohydrology and hydrogeology.

这一主题被分为水文地质学和地质水文学。

By introducing the micro change of water level, its forming condition and forming reasons, the author tries to research the geohydrology and mining technical conditions of the ore field.

通过介绍水位微动变化及其形成条件、产生原因等，试图从另一侧面认识和研究矿区水文地质条件、矿床开采技术条件等。