I'll get my own back on him one day, I swear!

我发誓，我总有一天要报复他的。

《牛津词典》

When he was only 11, his father became badly ill and one day he came back with an unwanted baby girl.

当他只有11岁的时候，他的父亲得了重病，一天他带着一个被遗弃的女婴回来。

youdao

She waited in the forlorn hope that he would one day come back to her.

她几乎毫无指望地等待他有一天会回到她的身边。

《牛津词典》

One day,Mama and Caroline came back to the island on a boat after Carolines singing lesson.

VOA: special.2009.02.14

One day I got a ride in the back of a truck.

VOA: special.2010.01.30

Barbara Klein has more. The band that brought us one of the best albums of the decade is back with a new CD, It is Green Day's eighth studio album.

VOA: special.2009.05.29

Jonas Lee dreamed up the idea one day back in 1992 while sitting around with some Harvard Business School classmates tossing get-rich- quick schemes back and forth.

FORBES: Soothing angry spouses

Ms. Karoustas, now 43, said it had never crossed her mind that she would one day go back to Germany.

WSJ: Southern Europe Job Seekers Head for Germany

One day, back in 2007, Pauline was my boss.

WHITEHOUSE: President Obama on Ensuring Fair Pay for In-Home Care Workers | The White House