The rapid expansion of cities can cause social and economic problems, such as pollution and traffic problems.

城市的快速发展可能引起社会和经济问题，比如污染和交通问题。

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Xiong'an New Area will help to work out many big problems of Beijing, such as traffic jams.

雄安新区将有助于解决北京的许多大问题，比如交通堵塞。

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The study also cites efforts in some cities to reduce emissions as part of a larger strategy to ease traffic and other problems.

这项研究还介绍了，作为缓解交通及其它问题的上层策略的一部分，一些城市如何努力去减少排放。

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Many places struggle with traffic problems as more and more cars fill the roads.

VOA: special.2010.01.11

The U.N.says they include loss of productivity and family income, as well as violence, security problems and traffic and workplace accidents.

VOA: standard.2010.06.23

Clark sees traffic congestion as one of the most serious problems of our time - for a variety of reasons.

VOA: standard.2010.07.26

Other information, such as traffic problems and the performance of individual couriers, also needs to be taken into account.

ECONOMIST: A courier company goes online

The city's transportation agency, Transport for London, reported moderate traffic problems Wednesday morning as the rules went into effect.

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Protesters predicted that the community centre would cause traffic problems, but the As-Salaam Trust said many users would walk to the facility.

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