Various types of influenza viral strains can cause human influenza and avian influenza. Major changes in the genetic make-up of the virus may even result in an influenza pandemic.是什么意思_Various types of influenza viral strains can cause human influenza and avian influenza. Major changes in the genetic make-up of the virus may even result in an influenza pandemic.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句