我们必须采取措施改善交通状况。
交通设计和信号控制是缓解交通问题和改善交通现状有效技术措施。
Traffic design and signal control are effective measures to alleviate and improve traffic.
交通设计和信号控制是缓解交通问题和改善交通现状有效技术措施。
Traffic design and signal control are effective measures to alleviate and improve traffic.
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