In virtual storage systems, the ratio of the size of real storage to the size of virtual storage. 在虚拟存储系统中，实际存储器的大小与虚拟存储器的大小之比。
The transfer of pages between real storage and auxiliary storage. 实存与辅存之间的页面传送(过程)。同pageturning。
In a virtual storage system, a fixed-length block that has a virtual address and that is transferred as a unit between real storage and auxiliary storage. 在虚拟存储(器)系统中，具有一个虚拟地址并且可以在实存储器和辅助存储器之间作为一个单位来传送的一种长度固定的(数据)块。
