Network has the advantages of multi-media, globalization and super-media for information resources and also shares the advantages of interactive and the effectiveness for a given period of time.
网络具有信息资源的多媒体、全球性、超媒体优势，还具有交互和时效性的优势。
Due to time effectiveness for water regime information transmission, acquisition of source data to final calculated results should be accomplished during a given period of time.
水情信息传递的时效性，要求从原始数据采集到最终计算结果的取得，须在有限的时间内完成。
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