Nowadays ,with the development of our country,s economy, an increasing number of peasants come to cities. The phenomenon  result in some problems.

　　There are a lot of issues for this phenomenon, and the follows are mainly. Firstly, more peasants come to big cities, a part of them couldn,t find a suitable job, so they couldn,t support themselves. Secondly ,this phenomenon will cause another problems such as houses shortage, traffic jams  and so on. Thirdly, those people who couldn,t find jobs may steal , rob and do other bad things. Lastly, lots of migrant workers come to cities will result in the decrease of the rural labor force ,and the children who live in rural lack of love and care from their parents.
           
In my opinion, the migrant workers have made a great contribution to the prosperity of cities. Taking these factors into account, we can conclude that the problem of migrant workers is a two-edged sword. To sum up ,effective measures must be taken before things get worse. For instance , it is essential that the government create more job opportunity, laws and regulations should be taken to let migrant workers go into cities orderly, as long as this measures are taken ,these problems will be solved and migrant workers will surely make greater contribution to cities.

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来源：清华在线