独自一人

One can habituate oneself to living alone, though rarely with any pleasure.

虽然独生活很少会有乐趣，但还是可以习惯的。

I work more efficiently on my own.

我独工作效率更高。

He went to the bandits' lair all by himself!

他独闯了土匪。

I was alone with no money or possessions.

我独，有钱，也有财产。

He was alone in the house.

他独在家里。

He was alone in the room.

他独在屋里。

He was unhappy when alone.

他独时感到不快活。