The system vicissitude is the key factor in modern society. 制度變遷是社會(huì )現代化變革的關(guān)鍵性因素。
The second part analyzes the cause of Electoral System Vicissitudes in respect of both exogenous change and endogenous change. 第二部分從外生變遷和內生變遷兩個(gè)方面分析選舉制度變遷的動(dòng)因。