来自《耶鲁大学开放课程：1600年后西方社会的流行病 第7集 第7集》
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This is the story of what happened when the disease was这故事讲的是一种疾病被 -
suddenly introduced to populations突然传播到一个 -
in part of the world陌生地区的人群里 -
where it was a new invader;变成入侵者时引起的种种后果 -
where it arrived from outside,在这疾病来源的地方 -
had never been an endemic infection and therefore against它从来不是一种地方性传染病 -
which the native or aboriginal population所以当地的人或土著 -
had no immunity at all.不会对其毫无抵抗力 -
Then it produced real catastrophes,在这里 它开始造成真正的大灾难 -
events described as "Virgin soil epidemics."这被描述为"处女地流行病" -
These were catastrophes that accompanied European expansion这些大灾难伴随着欧洲人扩张领土的脚步 -
to the New World, Australia, New Zealand.进入了新世界 澳大利亚和新西兰