每个服务区域都具有对实际存储的需求。
It's IMDGs that want to be real storage when they're all grown up, not the other way around.想要成为真正存储的是IMDG,而不是其他方式。
To transfer instructions, data, or both, between real storage and external page storage.在实存储器和外部页式存储器之间传送指令、数据或指令和数据。