服务器副本的用户拥有最新信息。
Users of the server replica always have up-to-date information.
另外,只应该在用户操作服务器副本时显示它。
In addition, it should only be displayed when the user works on the server replica.
它还保证了信息对服务器副本的所有用户来说都是最新的。
It also insures that the information is up-to-date for all users of the server replica.
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