Finally, Mr. A called Mr. B a wonderful man.

最后A先生称B先生是位出色的人。

youdao

Another patient, Mr. B, suffers from an incomplete paraplegia caused by a spinal cord injury at T2 two years ago.

另一位病人B先生两年前因为T2脊髓损伤造成了不完全截瘫。

youdao

Mr. A was counsel for the plaintiff, and Mr. B for the defendant.

A先生作原告的辩护人， B先生作被告的辩护人。

《新英汉大辞典》

The court held by six votes to one that there would be no violation of Article 3 (prohibition of inhuman and degrading treatment) of the European Convention on Human Rights if the two failed asylum seekers - referred to as Mr H and Mr B - were removed to Afghanistan.

BBC: Damages for rapist unlawfully held in prison

At one point, you know, Jack Straw said, they didn't come out and name anyone in particular, and he said, we don't care if it's Mr. A or Mr. B, we just don't want to deal with Mr. Nobody.

NPR: Rice, Straw Visit Iraq, Prod Leaders on Government

And now, it is my pleasure to bring out our first performer to the stage, the King of the Blues, Mr. B.

WHITEHOUSE: President Obama Welcomes Guests to ��In Performance at the White House: Red, White and Blues�� | The White House