City traffic problems have troubled most industrially developed countries since the commencement of the 20th century.
城市交通问题是本世纪以来,工业发达国家一直为之困扰的问题。
But of the 12 countries considered least at risk, including Britain, all but one are industrially developed.
而12个估计受威胁最小的国家,包括英国,除了一个之外均为发达国家。
But of the 12 countries considered least at risk, including Britain, all but one are industrially developed.
而12个估计受威胁最小的国家,包括英国,除了一个之外均为发达国家。
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