城市农民工对社会做出了巨大贡献，但他们中大部分却没有基本的医疗保障。
Migrant workers in cities have made great contribution to the society, but the majority of them had no basic medical insurance.
城市农民工对社会做出了巨大贡献，但他们中大部分却没有基本的医疗保障。
Migrant workers in cities have made great contribution to the society, but the majority of them had no basic medical insurance.
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