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

只有在我过度劳累的时候，在我长时间不断工作的时侯，在我感到内心空虚，需要充实的时候，我才会感到寂寞。

youdao

I'm 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.

只有在过度劳累时，我才会感到孤独，心也像被掏空了一般。

youdao

I'm lonely 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.

当过度劳累，长时间工作没有片刻休息或占时感到空虚需要填补的时候，我感觉孤独。

youdao