A client can request persistent objects from the server, and the server sends them as a graph of detached objects.
一个客户端可以向服务器请求持久化对象，然后服务器以分离对象图的方式将它们返回。
The JPA application holds no reference to the detached objects between the first access request and the subsequent change request.
JPA应用程序在第一个访问请求和后续修改请求之间并没有保持分离对象的引用。
应用推荐