来自《耶鲁大学开放课程：1600年后西方社会的流行病 第3集 第3集》

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  and that's tremendously important to the way
  同时 社会如何面对瘟疫的侵袭
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  that societies experienced its outbreak.
  是极其重要的
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  In the third stage, the bacteria releases a powerful toxin,
  在第三阶段 病毒释放出强力的毒素
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  and this circulates throughout the bloodstream,
  毒素随着血流在身体里循环
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  and it's the toxin that kills.
  这类毒素才是致命的
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  It attacks tissues, causing blood vessels to hemorrhage,
  它攻击人体组织 导致血管大量出血
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  and giving rise to purpurous, subcutaneous spots,
  引起紫红色皮下斑的出现
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  the so-called tokens of plague.
  这些被称为瘟疫的记号
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  Another bit of jargon to remember.
  这是又一则需要记住的行业术语
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  The plague is associated with tokens and these--
  瘟疫与标记相联系并且这些
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  let's have a look at-- which look like this.
  让我们来看 它看起来像这样
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  They gain their name
  它们被称为记号