The first part presents a background and meaning first, combining with overview the domestic and international library information resources network developments of investigative .
第一部门头后阐述了选题的背景及意义，并综述了海外外藏书楼信做资流网络化建设的评价体解研讨的情形。
With the rapid developments of database and network technology, a large number of heterogeneous data sources come into being.
随着数据库和网络技术的飞速发展，大量的异构数据源应运而生。
The recent developments of neutral point ground modes of medium-voltage power network and variety of national related standards are presented.
阐述了中压电网中性点接地方式的近况，国家有关标准的变化，企业应从中吸取有益的东西。
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