oxycycline

例句：

1. 1. This antibiotic is effective against many types of bacteria.
   这种抗生素对许多类型的细菌都有效。
2. 2. The patient was given a prescription for oxycycline to treat his infection.
   患者被开了一张处方，用来治疗他的感染。
3. 3. Oxycycline is often used as an alternative to penicillin in treating bacterial infections.
   氧四环素常被用作青霉素治疗细菌感染的替代药物。