For example, the industry network connection events are available at no charge to participants in the industry networks.
比如说,行业网络联络会议可以被行业网络的参与者免费获得。
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Delay-Tolerant Network ( DTN) is a kind of new network, which characterized with high link delays, intermittent connectivity and limited node resources, there is no continuously available connection between source and destination to support end-to-end interaction.