I have a dream that one day we will all live in peace.

我的梦想是有一天，我们所有人都生活在和平之中。

youdao

One day we will leave our parents.

总有一天我们会离开父母。

youdao

One day we were travelling around the center of London.

一天，我们在伦敦市中心旅行。

youdao

And the kind of sedentary lifestyle that we lead, are one of the reasons why we have every day the number of obese people in India increasing."

VOA: special.2010.05.12

Far more unrealistic would be the belief of those who argue, and I'm thinking here of names like Immanuel Kant and others from the eighteenth and nineteenth century, that one day we can abolish war altogether, and therefore abolish the passions that give rise to conflict and war.

不切实际,将是那些争辩者的信念，就像康德或其它,十八及十九世纪的思想家，幻想有一天我们可以全面终止战争，进而废除,引起冲突与战争的激情。

耶鲁公开课 - 政治哲学导论课程节选

Do you think that one day we will be able to find an alternative energy?

你觉得有一天我们能找到替代能源吗？

对全球变暖的政策 - SpeakingMax英语口语达人

Nunu didn't like messing about with the hives, and one day we sold all eighteen colonies.

NPR: Excerpt: 'Esther's Inheritance'

I'll be happy when one day we do a thousand shows in one night.

BBC: Should music fans stop filming gigs on their smartphones?

"One day we will have the Welsh Grand National here, " Mr Walters confidently predicted.

BBC: Racecourse under starter's orders