集中式数据库系统 meaning in English

centralized database systems

Because distributed database system is not the simple combination of internet and database system , it is difficult to realize and there is not real distributed database system for commercial use now
由于分布式数据库系统并不是网络技术与集中式数据库系统的简单结合，它的实现难度极大，现今还没有真正的商用分布式数据库系统。
In addition , distributed database system contains more complex contents than centralized database system . this essay aims to research on the principle , design and realization technology of oracle distributed database system
另外，在查询处理、事务管理、数据的完整性与安全性等方面，分布式数据库系统比集中式数据库系统具有更复杂、更丰富的内容。