只有在我极度疲惫，长时间工作而没有休息的时候，或是在我感到内心空虚而需要充实的时候，我才感到寂寞。

I am lonely only when I am overtired, when I have worked too long without a break, when for the time being I feel empty and need filling up.

youdao

只有在我极度疲惫，长时间工作而没有休息的时候，或是在我感到内心空虚而需要充实的时候，我才感到寂寞。

I am lonely only when I am overtired, when I have worked too long without a break, when for the time being I feel empty and need filling up.

youdao