路由器然后查看地址转换表，看有没有一个条目是这个内部本地地址对应的内部全局地址。

The router then checks the address translation table to find if there is an entry existing for the inside local address with a corresponding inside global address.

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为了能同时对虚拟地址空间和它对应的页表都进行分页。

So we can page the virtual address space AND page the page table.

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为了找到指定虚拟地址所对应的物理地址，必须定位于合适的页表及其中正确的入口。

To determine the physical address corresponding to a given virtual address, the appropriate page table, and the correct entry within that page table must be located.

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