Every year new strains of influenza develop.每年都有新的流感病毒出现。They took steps to prevent the spread of influenza.他们采取措施阻止流感的传播.The last attack of influenza has left me rather groggy.上次患流行性感冒后使我至今软弱无力....
...an outbreak of equine influenza.马流感爆发The last attack of influenza has left me rather groggy.上次患流行性感冒后使我至今软弱无力.pandemic influenza.流感Influenza is an infectious disease.流感是一种传染病。They took steps to prevent the spread of i...