当然，城市的交通规划者们对于这个问题也是很清楚的，毕竟，城市交通总是充斥了各式各样的负外部性问题，例如某位司机轻踩刹车的微小行为，就会引发一连串的连锁效应，对众多其他司机产生影响。
Urban planners know this problem all too well. After all, traffic is filled with negative externalities.
这类强而轻的材料具有广泛的用途，比如在交通运输工具及假肢器械行业的应用。
There are a wide range of uses for these strong, light weight materials, suchas in vehicles or prosthetic devices.
新型复合材料具备耐磨损、隔温、防腐蚀、强度高、重量轻等多种优点，是现代交通工具上应用的理想材料。
This article intorduces briefly a new kind of composite which has a lot of advantages such as wear-resistance, thermal isolation, corrosion resistance, high strength, and light weight, etc.
请建立并分析一个数学模型来评估这一交通规则在交通压力轻时和交通压力重时的表现。
Build and analyze a mathematical model to analyze the performance of this rule in light and heavy traffic.
请建立并分析一个数学模型来评估这一交通规则在交通压力轻时和交通压力重时的表现。
Build and analyze a mathematical model to analyze the performance of this rule in light and heavy traffic.
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