First section in the article is the introduction . chiefly introduces researching target and the aim , present researching situation , researching process and researching means 文章第一部分是绪论，主要交代了研究对象和目的，研究现状，研宄过程及研究方法。
2.
It is considered that the sequence evolution in the palaeozoic went through the following three stages , the filling of evaporate platform , the filling of carbonate and detrital rock mixed deposits in epiric sea , and the filling of detrital deposits of lake - deltas in paralic inland sag 认为研宄区古生界层序演化经历了以下三个阶段：蒸发台地充填阶段、陆表海碳酸盐岩与碎屑岩混合沉积阶段，以及近岸内陆坳陷的湖泊三角洲碎屑岩沉积阶段。
3.
Abstract : the essay expounds that qian xuesen always advo cated the combined study of architecture and city , and consid ers the procedure of qian xuesen s theory about shan - shui city " as three stages : the phase of thought in gestation ; the phase of conception in forming ; theory development and execu tion 文摘:文章阐述钱学森贯主张建筑与城市应该结合起来研宄并认为钱学森山水城市理论的发展可以分成：思想孕育、概念形成、理论发展和推动实施三个阶段。
