diphacin

例句：

1. 1. The doctor prescribed diphacin for my son's cold.
   医生给我儿子开了双环素治疗感冒。
2. 2.Diphacin is a common antibiotic used to treat bacterial infections.
   双环素是一种常用的抗生素，用于治疗细菌感染。
3. 3. After taking the medication, my symptoms significantly improved.
   服用药物后，我的症状明显好转。