systeminfo系统信息systemn.系统；体系；身体；制度System Acquisition Career系统采购专业(美国)system of learned journal学报系统system information network法律规制system bus interface logic系统总线接口逻辑System Support Engineering系统支援工程system of Web of Knowledge知网系统system management software系统管理软件system toleration judgment容错判据System Library Maintenance系统程序库维护system of teacher training教师培训制度

1. The system vicissitude is the key factor in modern society.
   制度变迁是社会现代化变革的关键性因素。
2. The second part analyzes the cause of Electoral System Vicissitudes in respect of both exogenous change and endogenous change.
   第二部分从外生变迁和内生变迁两个方面分析选举制度变迁的动因。