undulant fever

例句：

1. 1. The patient was diagnosed with an undulant fever.
   病人被诊断出患有无热病。
2. 2. The doctor prescribed antibiotics for the undulant fever.
   医生为无热病开了抗生素。
3. 3. The patient recovered after several days of undulant fever treatment.
   经过几天的无热病治疗，病人康复了。