Under the modern network environment, owing to the characters of multi hosts, fast spread, high destructive effect, etc, computer virus has become public nuisance of the information society.
现代网络环境下的计算机病毒，以其宿主多、传染快、破坏性强等特征，已经成为信息社会的公害。
Meanwhile, with fast development of network and communication Technology and emerging demands of multimedia information, IP-based network infrastructure is used for multimedia transport.
与此同时，网络技术飞速发展，多媒体信息需求急速增加，基于IP的网络架构日益成为作为信息传输的媒介。
A fast, flexible information network is as essential to manufacturing as steel and plastic.
快速、灵活的信息网络对于加工业，如钢铁和塑料是极其重要的。
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