操作系统将对VPA中与所使用的资源相对应的字段进行设置，并在VPA中维护它们的浅副本。
The operating system sets the fields corresponding to the used resources in the VPA and maintains a shallow copy of them in the VPA.
开发人员通过运用操作系统抽象层，可使用跨多种操作系统平台的标准API，降低与编码维护和学习几种操作系统相关的成本，缩短相关时间。
With OS Abstractor, developers use a standard API interface across several OS platforms, reducing the costs and time associated with code maintenance and learning several operating systems.
介绍了并联系统ups的特性及其实现，现场外接旁路的设计与具体操作，以及日常维护中的问题。
The characters and reality of double parallel system UPS, external bypass design and operation, and the Suggestions about the ordinary maintenance are introduced also.
关键数据的备份与恢复操作已经成为系统日常运行维护的一个重要组成部分。
Backup and recovery operation of crucial data have become an important part of systematic daily operation maintenance.
我们使用该系统能方便完成工程概预算文件的编制、打印与归档保存，以及各类建筑定额的维护操作。
We can edit , print and save engineering budget and budgetary estimate , and maintain various construction project quota by this system.
现场运行证明，该系统运行稳定可靠，操作与维护简便，其系统冗余、安全可靠性的思想，对我国长输管道SCADA系统设计与开发有一定借鉴作用。
The field running shows that the SCADA features reliable, easy operation and maintenance. Its redundancy and reliability is of consideration for design and development of pipeline SCADA in my country.
详细讨论了组织控制、系统开发与维护控制、系统安全控制、硬件及系统软件控制、操作控制等控制方法。
Analyze the methods of organization control, system development and maintenance control, system security control, hardware and software control in detail.
本文提出了操作系统的安全设置与保护、维护及快速修复的一些新的方法，以供广大读者参考。
This paper presents some new methods to the security configuration on maintenance and rapid recovery, as reference for readers.
本系统功能丰富，便于操作，成本低，安装与维护方便，且便于以后的开发与扩展。
The system has abundant functions and has many merits, such as convenient operation, low cost, convenient to setup and maintenance, easy to development and extend.
本系统功能丰富，便于操作，成本低，安装与维护方便，且便于以后的开发与扩展。
The system has abundant functions and has many merits, such as convenient operation, low cost, convenient to setup and maintenance, easy to development and extend.
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