empty nest syndrome
noun [ U ] uk/emp.ti ˈnest ˌsɪn.drəʊm/ us/emp.ti ˈnest ˌsɪn.droʊm/
空巢综合症（指父母因子女长大离家而郁郁寡欢）
the sad feelings that parents have when their children grow up and leave home
The last of her children had recently moved out and she was suffering from empty nest syndrome. 她最小的孩子最近搬出去住了，她倍受空巢综合症的煎熬。