Pages are defined as fixed length data blocks and held in virtual memory.
页面定义为固定长度的数据块，并且保存在虚拟内存中。
2
The increasing use of new tools such as computerised virtual design helps cut the cost and length of time needed to bring new models to market, but it is still an expensive process.
像电脑虚拟设计这样的新工具使用的增加大幅缩小了新车型开发的费用和周期。不过这些新工具依然价格不菲。
3
In a virtual storage system, a fixed-length block of contiguous virtual addresses copied as a unit from memory to disk and back during paging operations.