stratigraphic unit短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 地层分层单位,地层单元 On the basis of the study on regional tectonic, the tectonic evolution of middle and upper Proterozoic tectonism stratigraphic unit has been systematically analyzed. 在区域地质构造研究的基础上,本文以地球动力学的观点系统地分析了中上元古界构造特征和演化。 cnki