The cost formula in the existing equilibrium theory does not include the delay time at nodes. So, the researching results of the theory are unsuitable for urban road network.
已有的均衡分配理论中的阻抗公式不包含车流在交叉口的延误,其研究成果并不真正适用于城市道路网络。
Even though the study does not include the cost of college, USDA found that children get more expensive as they get older. Teenagers were the most costly.
虽然调查未将上大学的成本计算在内,但美国农业部发现,随着孩子年龄的增长,他们需要用钱的地方越来越多。孩子在十几岁时花销最大。
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