One rule of thumb is that server classes belong in a domain package and will often form their own domain packages because they are the last stop for message flow within an application.
有这样一条经验可以遵循，服务器类属于一个域包并且常常会形成它们自己的域包，因为它们是应用程序里消息流的最后一站。
IM provides an efficient mechanism to maintain software packages providing a one-stop shop for install, update, modify, and uninstall operations.
IM提供了一种高效机制来维护软件包，从而为安装、更新、修改和卸载操作提供了一个一站式服务。
IM provides an efficient mechanism to maintain software packages providing a one-stop shop for install, update, modify, and uninstall operations.
IM提供了一种高效机制来维护软件包，从而为安装、更新、修改和卸载操作提供了一个一站式服务。
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