独自一人

He went to the bandits' lair all by himself!

独自一闯了土匪窝。

I work more efficiently on my own.

我独自一工作效率更高。

I was alone with no money or possessions.

我独自一，没有，没有财产。

He was alone in the house.

独自一在家里。

He was alone in the room.

独自一在屋里。

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

虽然独自一很少会有乐趣，但还是可以习惯的。

He was unhappy when alone.

独自一时感到不快。