An increasing number of experts believe that migrants will exert positive effects on construction of city . However, this opinion is now being questioned by more and more city residents, who complain that the migrants have brought many serious problems like crime and prostitution.

　　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,象犯罪和卖淫.

　　Many city residents complain that it is so few buses in their city that they have to spend much more time waiting for a bus, which is usually crowded with a large number of passengers.

　　许多市民抱怨城市的公交车太少,以至于他们要花很长时间等一辆公交车,而车上可能已满载乘客.