The element associations and their spatial temporal distribution are discussed based on synthetic analyses of multiple geological and geochemical information.
本文以多种地质、地球化学信息为基础，讨论该矿元素组合及其时空分布。
Based on comparative analysis on spatial temporal distribution characteristics of soil nutrients of typical dam land in Beigou small watershed of Yan 'an City.
通过对延安市北沟小流域典型坝地土壤养分的测定，分析比较了其土壤养分时空分布特征。
Meanwhile, the drought criterions, drought indexes as well as spatial and temporal distribution characteristics within dry periods are analyzed.
文章还对江西干旱标准、干旱指数与伏、秋干旱时空分布客观特征等进行分析。
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