The mapping of virtual memory to physical memory occurs through page tables, which are implemented in the underlying hardware (see Figure 1).

虚拟内存到物理内存的映射通过页表完成，这是在底层软件中实现的(见图1)。

youdao

For every page mapped by each process, page-table entries must also be created to map the virtual address to the physical address.

由于每个页都要由每个进程映射，必须创建页表条目来将虚拟地址映射到物理地址。

youdao

The operating system maintains a table of virtual address-to-physical address translations so that the computer hardware can respond properly to address requests.

操作系统维持着一个虚拟地址到物理地址的转换的表，以便计算机硬件可以正确地响应地址请求。

youdao

Resource pooling is the ability of a cloud to serve multiple customers using a multi-tenant model with different physical and virtual resources dynamically assigned and reassigned according to demand.

FORBES: The Economic Benefit of Cloud Computing

Players in Second Life break plenty of physical laws, flying and teleporting around their virtual world and crafting made-to-order bodies and buildings.

FORBES: Second Life Goes Legit

Credit card issuers are increasingly using social-media sites to engage with customers, and some consumer advocates worry the virtual may replace the physical pitch on college campuses.

FORBES: This Week in Credit Card News