The D, 18O isotopes peak displacement method is used to estimate the precipitation infiltration quantity in the study area.
采用D、18O同位素峰值位移法求出研究区大气降水入渗补给量。
Based on the experiments, a chemical procedure used for rapidly separating thorium from the natural uranium irradiated by 18o ions was developed.
在条件实验的基础上提出了一个从中能18o离子照过的天然铀样品中简便、快速地分离钍的化学流程。
With the application of hydrogen and oxygen isotopes(2H, 3H and 18O) and carbon isotope(14C), the recharge and renewability of confined water in Yinchuan Plain have been analyzed.
利用地下水氢氧同位素（2H、3H和18O）和碳同位素（14C）方法，分析银川平原承压水的补给更新能力。
A colorless aromatic liquid, C10H 18o, obtained from citronella and certain other essential oils or produced synthetically and used in making perfumes and as a commercial flavoring.
一种无色有芳香气味的液体，C10 H18o，从香茅油和其他原油中提取或人工制成，用于制作香水和商业香料。
A colorless aromatic liquid, C10H 18o, obtained from citronella and certain other essential oils or produced synthetically and used in making perfumes and as a commercial flavoring.
一种无色有芳香气味的液体，C10 H18o，从香茅油和其他原油中提取或人工制成，用于制作香水和商业香料。
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