Rather than sequentially searching through the text data using string matching, as done with the XQuery contains function, Net search Extender USES a text index.
NetSearchExtender并不使用字符串匹配连续地搜索文本数据(就像XQuerycontains函数所做的那样)，而是使用文本索引。
Support alarm function, net interruption alarm, video loss alarm.
支持报警功能，网络中断报警，视频丢失报警。
Support alarm function, net interruption alarm, video loss alarm.
支持报警功能，网络中断报警，视频丢失报警。
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