Zidovudine may be used on its own to treat pregnant women infected with HIV.可以单独使用齐多夫定治疗感染艾滋病毒的怀孕妇女。The discovery of penicillin was a gigantic step in the treatment of infections.青霉素的发现在治疗感染方面跨出了巨大的一步。The discovery of penicillin was a major step forward in the treatment of infections.青霉素的发现在治疗感染方面是一个重大进展。