Basing on the observational data of dense fog during 1965 ~ 2008 in Fangchenggang city, the temporal and spatial distribution characteristics of dense fog were analyzed.

利用防城港市1965 ~ 2008年的大雾观测资料，分析了防城港市大雾空间、时间分布的基本气候特征。

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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。

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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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