The second part ( including the third, four chapters) is the basic research part.
第二部分（包括第三、四章）是基础研究部分。
The Second & Third Chapters survey respectively the ways of knowledge communication of Western Europe in the late Middle Ages in respects of churches, libraries, ordinary schools and universities.
第二章与第三章分别从教会、图书馆、一般学校、大学等四个方面，考察西欧中世纪后期知识传播的途径。
The third and fourth chapters describe the applications of point supported glass on curtain wall and roof respectively, and summarize their design features based on real world examples.
第四章详细介绍点式玻璃技术在建筑屋顶和雨篷上的应用，通过实例的研究，总结出点式玻璃屋顶和雨篷的设计特点。
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