他孑然一身度过晚年。

He lived alone in his old age.

她孑然一身，常感到寂寞。

She lives alone and often feels lonely.

总是记得，在这里你不是孑然一身。

And always remember you are not alone in this.

如果感情是强求我宁愿一辈子孑然一身。

If feelings are hard I'd rather be alone all my life.