Then one day his worst fears were confirmed.

后来有一天，他最大的担心被证实了。

《柯林斯英汉双解大词典》

Then one day, I got a call that my father was ill.

后来有一天，我接到一个电话，说我父亲病了。

youdao

Then one whale swam in the direction, directly towards land.

然后一头鲸鱼径直朝陆地游去。

youdao

Then one day, Everett saw that his chair in the living room was getting old.

VOA: special.2009.03.07

If the goal is to improve education, then one has to ask hard questions Like does a technology actually help?

假如目标是提高教育，那就要问问这样的问题,技术真的有帮助吗？

麻省理工公开课 - 媒体、教育、市场课程节选

and then one day I'll be like, "Oh, I want to dress like a clown today, so I will."

而可能有时候，我想，“喔，今天我想打扮成一个小丑，然后我就这么做了。”

时尚让人兴奋 - SpeakingMax英语口语达人

Then one day the haze lifted and I saw the Pamirs for the first time.

BBC: Following the Silk Road to the end of China

Then one weekend morning the Smiths went to their daughter's bedroom and discovered she was missing.

CNN: SHARE THIS

When science seems to contradict religion, then one, the other, or both are wrong, or incomplete.

FORBES: The Survivor Part 7 - Clayton Christensen Discusses Life And Death Issues