分类：教育/科学-外语学习
问题：WorldnewsTranslation(3)Theso
The so-call "shift-and-drift" nature of the flu also means that human beings who get their shots or catch that particular bug are only protected from that one specific strain during that one specific time. Unlike immunity to most other diseases, immunity to influenza is fleetiThe so-call "shift-and-drift" nature of the flu also means that human beings who get their shots or catch that particular bug are only protected from that one specific strain during that one specific time. Unlike immunity to most other diseases, immunity to influenza is fleeting.
回答：流感的所谓“漂移不定不断变异”的特点意味着人类在注射疫苗或者说感染上某一特殊病毒后只能在某个特定的时间里免受该特定病毒菌株的感染。与对其它大多数疾病的免疫不同，对流感的免疫只是暂时的。