monosomy

例句：

1. 1. He was diagnosed with mononucleosis after returning from a trip to Europe.
   他在欧洲旅行后被诊断出患有单核细胞增多症。
2. 2.The patient's condition worsened, and he was admitted to the hospital for treatment of mononucleosis.
   患者的病情恶化，被收治入院治疗单核细胞增多症。
3. 3.Mononucleosis is a common illness that can be prevented by getting vaccinated against certain viruses.
   单核细胞增多症是一种常见的疾病，通过接种某些病毒疫苗可以预防。