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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But there are worries that brisk economic growth may not be enough to address problems such as lack of access to schooling and health care for millions of Indians.

然而，人们担心经济的快速增长可能不足以解决数百万印度民众缺乏教育和医疗服务等这类问题。

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Optimization problems often emerge in many fields, such as engineering design, science research and economic management.

最优化问题是工程设计、科学研究、经济管理等众多领域经常遇到的一类问题。

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One could speculate that growing concern about the lack of jobs is linked to current economic worries, such as financial problems for euro currency and the resulting slowdown of major economies.

BBC: Unemployment is world's fastest-rising fear - survey

Four decades after its establishment, SERVOL continues to implement a number of community-based development and educational projects primarily because the socio-economic problems that led to its formation, such as poverty, sharp socio-economic inequalities, youth criminality or gang violence and drug abuse as well as the disintegration of family structures, high illiteracy rates among and lack of livelihood and educational opportunities for the poor majority, remain prevalent in the country today.

UNESCO: Adolescent Development Programme

"The Pennsylvania legislature could have rationally believed that some married women are initially inclined to obtain an abortion without their husbands' knowledge because of perceived problems -- such as economic constraints, future plans, or the husbands' previously expressed opposition -- that may be obviated by discussion prior to the abortion, " wrote Alito.

CNN: Alito's record shows conservative judge