摘要
连续数日的高热、发冷以及倦怠无力——这是流感的典型症状一而流感病毒在每个世纪都会发生几次根本性的变异，从而引发大规模的流行性疾病，健康专家也由此担心甲流同样会重蹈覆辙：
A few days of fever, chills and generally feeling rotten： that＇s a typical case of the flu. But several times a century, flu viruses mutate so radically that they can trigger a pandemic--as health experts fear could happen with H 1 N 1 influenza.
出处
《海外英语》
2009年第11期43-43,共1页
Overseas English
