创建并运行内核后，调用POJO服务上的方法就变成了练习使用Geronimo内核服务器及其反射功能，如清单4所示。
After you create and run the kernel, invoking a method on a POJO service simply becomes an exercise in using the Geronimo kernel server and its reflection capabilities, as shown in Listing 4.
在 Windows NT 4 中，视频、服务器和打印机后台处理程序子系统被移动到内核模式。
In Windows NT 4, the video, server, and printer spooler subsystems were moved into kernel mode.
这让内核扩展可以作为网络客户机或服务器。
This allows kernel extensions to act as network clients or servers.
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