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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which simply means the kill rate that a disease achieved.病死率是说疾病所致的死亡率 -
In the case of bubonic plague,以腺鼠疫为例 -
it normally killed fifty to seventy percent通常能致百分之五十至七十的 -
of the patients it infected;感染病人死亡 -
a rate attained by few other diseases.这是极少有其它疾病能够达到的数字 -
Its course in the human body was also terrifyingly swift.它在人体内的病程也极为快速 -
Normally it killed within about通常腺鼠疫大概 -
three days of the first appearance of symptoms.在初次表现出症状的三天内就能致人死亡 -
Another feature that was characteristic另一个腺鼠疫的特点是 -
of bubonic plague was the profile of its victims.它的受害者的层面 -
I mean that both in terms of their age and their social class.就他们的年纪和社会阶层而言 -
Familiar endemic childhood diseases一些相似的地方性儿童疾病