program isolation (pi)怎么读

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program isolation (pi)英语什么意思：An IMS/VS facility that separates all activity of an application program from any other active application program until that application program indicates, by reaching a synchronization point, that the data it has modified is consistent and complete.; 虚拟存储信息管理系统(IMS/VS)的一种设施,它把一个应用程序的所有活动同其它运行的应用程序分隔开,直到该应用程序到达一个同步点,表明已修改的数据是一致的并且是完整的为止。