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最近,爆发于墨西哥的甲型H1N1流感已传播到其他国家。其实,随着经济的发展,人与动物接触的机会增多;随着交通的发展,世界人口的流动速度加
Recently, the influenza A (H1N1) outbreak in Mexico has spread to other countries. In fact, as the economy develops, opportunities for human and animal contact increase. With the development of transport, the world’s population flows faster