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。
The emergence of a knowledge-based economy as well as rapid developments in network information systems have fundamentally changed the way knowledge is exchanged.
随着知识经济的到来和网络信息技术的迅速崛起，知识交流的环境发生了质的变化。
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