过去每一百年内会发生三至四次的全球大型传染病疫潮。
Every hundred years there have been three or four pandemics.
过去每一百年内会发生三至四次的全球大型传染病疫潮。
Every hundred years there have been three o 'r four pandemics.
他们警告，多洛以及肯尼亚达达·阿布那个过度拥挤的大型难民营，容易滋生像麻疹、经由水传染以及其他疾病的传染病。
They warn conditions both in Dollo and in the huge, overcrowded Dadaab refugee complex in Kenya are ripe for epidemics of measles, water-borne and other diseases.
他们警告，多洛以及肯尼亚达达·阿布那个过度拥挤的大型难民营，容易滋生像麻疹、经由水传染以及其他疾病的传染病。
They warn conditions both in Dollo and in the huge, overcrowded Dadaab refugee complex in Kenya are ripe for epidemics of measles, water-borne and other diseases.
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