get down from a horse;dismount from a horse是什么意思

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Hydrothermal Venting on the Seafloor and Formation of Organic-rich Sediments--Evidence from the Neoproterozoic Xiamaling Formation, North China;

海底热水活动与海相富有机质层形成的关系——以华北新元古界青白口系下马岭组为例

Zircon SHRIMP U-Pb dating of the tuff bed in the Xiamaling Formation of the Qingbaikouan System in North China;

华北青白口系下马岭组凝灰岩锆石SHRIMP U-Pb定年

This paper describes a kind of rhodoids collected from Xiamaling Formation(900—873Ma).

本文记录了发现于下花园地区的新元古代青白口系下马岭组四段的红藻石。

Exemplified by the Xiamatou groundwater wellfield in Dong e County, Shandong, the hydrogeological functions of a large pumping test is discussed in this paper.

本文以山东省东阿县下马头水源地为实例,探讨了大型抽水试验的主要水文地质意义,包括:确定地下水的主要补给来源及方向,抽水影响范围及程度,水源地岩溶含水层的富水性及供水保证能力,水源地附近地下水与地表水之间的水力联系,水源地附近主要断裂构造的水力性质,水源地抽水对下游水源地的影响以及水文地质参数与水源地地下水允许开采量计算。