令人担心的是它可能会变异，从而轻易感染人类并造成传播；有可能引起造成上亿人死亡的大流行。
The fear is it could mutate into a form that people can easily catch and transmit; this could cause a pandemic that could kill hundreds of millions of people.
令人担心的是它可能会变异，从而轻易感染人类并造成传播；有可能引起造成上亿人死亡的大流行。
The fear is it could mutate into a form that people can easily catch and transmit; this could cause a pandemic that could kill hundreds of millions of people.
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