离群索居

1.The old man has been a loner all his life.

那位老人一生离。

2.The scholar was reticent, aloof, and meditative.

这位学者寡言少语、离而且总在沉思。

3.I was depressed,withdrawn and sexually frigid.

我郁郁寡欢,离,没有什么要求。