Unfortunately, swine flu's infectiousness and the globalized flow of human travel make for a very dangerous combination.
不幸的是,的传染和人员动的全球化形成一个非常危险的组合。
Unfortunately, swine flu's infectiousness and the globalized flow of human travel make for a very dangerous combination.
不幸的是,的传染和人员动的全球化形成一个非常危险的组合。
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