memory virtualvirtual memory unitvm virtual memoryvm,virtual memoryvn virtual memoryvst virtual storage虚拟: invented; fictitious存储器: accumulator; computer memory ...单虚拟存储器: single virtual storage多虚拟存储器: mvs multiple virtual storage虚存,虚拟存储器: virtual memory下载手机词典可随时随地查词查翻译