it appears as though the first victim, Melvin Lewis,

看起来第一名死者梅尔文·刘易斯
was held for a couple of months.

被关了好几个月
The second victim, Rudy Hightower,

第二名死者鲁迪·海托华
for one month, the third victim,

被关了一个月第三名死者
Susan Clark, for only a couple of weeks.

苏珊·克拉克只被关了几个礼拜
So why is he taking progressively less time with these victims?

为什么嫌犯在死者身上花的时间越来越少
He's getting more efficient?

因为他手段越来越高明了吗
He may have found a way to shorten the incubation period.

他可能找到了缩短病毒潜伏期的方法
And how would he do that?

那要怎么弄
Rabies attacks the nervous system.

狂犬病毒会侵害神经系统
It travels a few millimeters a day until it reaches the brain.

它会每天蔓延几毫米直到到达脑部
But if you were to infect the area around the head of the neck,

要是受感染的是颈部上端