1.Their architectural structure, religious function, iconographic program, theme and style are to be discussed.
对它们的建筑形制、石窟类型、宗教功能、绘塑题材、布局、风格与样加以探讨。
2.Iconographic changes:3 cases showed light patchy shadows along the streak line distribution;1 case showed patchy shadows confluent into a big patchy shadow.