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美国作为一个移民国家,几百年以来一直吸引着世界各国的人们义无反顾、源源不断地涌向这个国度,其中的主要原因在于他们都相信,在美国这片自由的
As an immigrant country, the United States has been attracting people from all over the world for hundreds of years without hesitation and flocking to this country continuously. The main reason is that they all believe that this freedom in the United States