e traffic jams during morning and agternoon rush hours are a headache in big cities now
e traffic jams during morning and agternoon rush hours are a headache in big cities now
正确答案：上下班高峰期的交通拥堵问题是大城市目前一个棘手问题。
e traffic jams during morning and agternoon rush hours are a headache in big cities now
正确答案：上下班高峰期的交通拥堵问题是大城市目前一个棘手问题。
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