In short, for each Arabic numeral, there is one, and only one, Roman numeral which maps to it.

简而言之，每个阿拉伯数字对应一个罗马数字，而且只有一个罗马数字映射到它。

youdao

This game signaled the return of our very own Captain Marvel, the one and only John Terry.

这场比赛标志着我们唯一的神奇队长约翰·特里的回归。

youdao

Here he is, the one and only Van Morrison!

他来了，这盖世无双的范•莫里森！

《牛津词典》

The I.M.F.predicts developing economies will continue to grow for the year, but only by about one and one-half percent.

VOA: special.2009.04.24

I think the genius of this parable hinges on the fact that the servant who was only given one talent seems to be acting so perfectly reasonably - with a laudable form of caution and hesitation, you could actually say.

我认为这则寓言的特别之处在于,那个只拿到一个金币的仆人,的行为是很合理的,-可以说是令人称赞的小心和犹豫。

耶鲁公开课 - 弥尔顿课程节选

There are only three people left in Britain who fought in World War One, only three, and they're about 110-years-old or something like that.

在英国,一战老兵,只剩下三个了,就三个,他们得有,大概110岁

耶鲁公开课 - 1871年后的法国课程节选

No - the European Parliament is the one and only directly-elected body in the EU and that is how it should remain.

BBC: Viewpoints: What future for the European project?

"It's an unhelpful message to say, 'It's your one-and-only-chance, '" she said.

BBC: Tips on how to survive the exam season

Inside the tech industry, companies eager to tap into all that excitement and potential revenue and brand-building are tripping over each other to position themselves as not just cloud providers but as real cloud providers, official cloud providers, the one-and-only-true cloud provider, and even as Wikipedia-approved cloud providers.

FORBES: The Cloud Revolution and Creative Destruction