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					In fact, a virus emerged in the 1970s that could've been just that fatal. 出自-2013年6月听力原文
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					Named after a river that passes through the Congo, the Ebola virus originally manifested itself in the interior of Africa in 出自-2013年6月听力原文
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					If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic. 出自-2013年6月听力原文
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					However, soon after these fierce outbreaks, the virus died out, at least temporarily 出自-2013年6月听力原文
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					What is Ebola virus named after? 出自-2013年6月听力原文
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					By inhaling air polluted with the virus 出自-2013年6月听力原文
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					More strains will evolve from the Ebola virus. 出自-2013年6月听力原文