If road network is only designed for motor vehicle, the role of density of network cant be displaced by the sparse network with wide road.
即使优先考虑机动车的出行效率，路网密度所起到的作用也不可能通过宽而稀的路网来实现。
It cant be described with current traffic model to the high burst of telecommunication network traffic.
现有的业务流模型难以描述高速通信网络中高速业务流的突发性。
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