基本解释蒙脱石同根派生 英汉例句Bsaed on underground md turface geochemical data and characteristics of regionalgeochemical field. the present paper has made oil-prospect evaluation of Lower YangtzeRegion. 本文以地面和井下化探资料，在研究区域地球化学场特征的基础上，评价下扬子地区的含油气远景。