求翻译：越来越多的专家相信移民对城市的建设起到积极作用。然而，越来越多的城市居民却怀疑这种说法，他们抱怨民工给城市带来了许多严重的问题是什么意思？

Growing number of experts believe that immigrants to the city has played an active role. However, more and more city residents are suspected of this argument, they complained to city workers brought many serious problems

An increasing number of Experts believe that migrants to the cities of the play. However, a growing number of urban residents were skeptical about this argument, they complained that migrant workers to the city with many serious problems

More and more many experts believe the immigration to the city construction positive role.However, the more and more many city peoples suspected actually this view, they complained the labourer has brought many serious issues to the city

A growing number of experts believe that immigrants to the city construction play a positive role. However, a growing number of city residents suspected of this statement, they complain about migrant workers to the cities has brought a lot of serious problems

More and more many experts believe the immigration to the city construction positive role.However, the more and more many city peoples suspected actually this view, they complained the labourer has brought many serious issues to the city