医学专家们害怕禽流感病毒会发生变异，从而成为一种可以在人与人之间轻易传播的疾病，并进而引发一场全球性的流感大爆发，最终导致数百万人死亡。
Experts fear the virus could mutate into a form that is easily transmissible between humans and spark an influenza pandemic, killing millions of people.
医学专家们害怕禽流感病毒会发生变异，从而成为一种可以在人与人之间轻易传播的疾病，并进而引发一场全球性的流感大爆发，最终导致数百万人死亡。
Experts fear the virus could mutate into a form that is easily transmissible between humans and spark an influenza pandemic, killing millions of people.
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