他们是非常可能接触到病毒，并而且非常可能流传病毒的一类群体。
They are the people who will be most likely to be coming into contact with the virus and the ones who could be passing it on.
一种新的流感病毒在四处流传。
研究团队结论认为，这种病毒在人类感染的首例之前，已经神不知鬼不觉地在猪只身上流传演化已久。
This, they conclude, means the bug was circulating and evolving undetected in swine for quite some time before the first people were infected.
病毒式营销"这个词儿一直流传了下来。
除了今次的病毒警告电邮外，在上个月也有类似的恶作剧电邮流传。上个月的电邮欺骗收件者，对他们说只要把一个电邮寄给二十个朋友，就可以得到一部免费的顶级爱立信手提电话。
The virus message follows one circulating last month that tricked recipients into believing they would get a free top-of-the-range Ericsson mobile phone if they forwarded a message to 20 friends.
除了今次的病毒警告电邮外，在上个月也有类似的恶作剧电邮流传。上个月的电邮欺骗收件者，对他们说只要把一个电邮寄给二十个朋友，就可以得到一部免费的顶级爱立信手提电话。
The virus message follows one circulating last month that tricked recipients into believing they would get a free top-of-the-range Ericsson mobile phone if they forwarded a message to 20 friends.
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