分布式多层系统由客户端应用程序，应用程序服务器和数据库服务器层次构成。
Distributed-tier structure is included to Client application program application program sever and Database sever.
分布式多层系统由客户端应用程序，应用程序服务器和数据库服务器层次构成。
Distributed-tier structure is included to Client application program application program sever and Database sever.
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