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选看: Welfare system in the US(medicare & medicaid)
medicare: (in the US) the federal insurance system that provides medical care for people over 65 医疗保障制度,老年保健医疗制度(美国政府向65岁以上的人提供的医疗保险)
medicaid: (in the US) the insurance system that provides medical care for poor people 医疗补助制度(美国政府向贫困者提供的医疗保险)

