key traffic

例句：

1. 1.The city's key traffic routes are always crowded during rush hours.
   这个城市的主干道在高峰时段总是非常拥挤。
2. 2.The company's key traffic is generated by its online sales platform.
   这家公司的主要流量来自于其在线销售平台。
3. 3. To improve efficiency, the government has implemented new traffic management measures.
   为了提高效率，政府实施了新的交通管理措施。