Linux也可以进行定制，这在其他操作系统中是不可能的(例如将内核做得最小并对内核进行扩充)。
Linux also permits customization not possible in other operating systems (such as minimizing and extending the kernel).
操作系统设计者必须解决在外存容量不足的情况下如何实施存储扩充。
What operating system designers must solve is how to implement memory expansion when there is not enough external storage.
在虚机扩充磁盘操作系统(VSE)中，把核心映象库中的程序段装入主存以便执行。
In VSE, to bring a program phase from a core image library into main storage for execution.
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