blue sickness

例句：

1. 1.He often feels blue when he's away from home.
   他离开家时经常感到忧郁。
2. 2.The blues have taken a toll on her health.
   忧郁症已经对她的健康造成了影响。
3. 3.She was diagnosed with blues and needed to take medication.
   她被诊断出患有忧郁症，需要服药治疗。