先锋霉素

例句：

1. 1. The antibiotic was effective against the bacteria that caused the infection.
   这种抗生素对引起感染的细菌有效。
2. 2. The doctor prescribed a course of antibiotics for her to treat the infection.
   医生给她开了一系列的抗生素来治疗感染。
3. 3. The patient recovered quickly after receiving the antibiotic treatment.
   患者在接受了抗生素治疗后很快就康复了。