Your wet towel, sir.

先生，您的湿毛巾。

youdao

May I make (so) bold (as) to ask your name, Sir?

我斗胆问一下您尊姓大名， 先生。

《新英汉大辞典》

Give your shoes a shine, sir?

先生，需要擦鞋吗？

youdao

"They hear the tone in my voice which is the tone of a sergeant. I say: 'Sir,I can see you got your horse all saddled, you need to put that fire out.' They hear that tone, and that kind of tone that I just said, that gets you killed in Mississippi.

VOA: standard.2009.11.25

Now turning to your sheet, in the early, early modern period the poet and courtier, Sir Philip Sidney, wrote an elegant, really wonderfully written defense of poetry, in one edition called The Apology for Poesie.

现在回到发给你们的材料上来，英国，伊丽莎白时期的朝臣及诗人，西德尼，曾写过很多很多，优美的诗歌，全部收录在一本名为《诗辩》的集子里。

耶鲁公开课 - 文学理论导论课程节选

Your wit, sir, is as thick as Tewkesbury Mustard,"

你的智慧，先生，像图克斯伯里芥末一样让人想流泪。”

记忆犹新的作品 - SpeakingMax英语口语达人

What is the purpose of your trip sir, an agent asked?

CNN: January 29, 2013 -- Updated 1437 GMT (2237 HKT)

"We need your help, sir, " one doctor told him.

NPR: Russian Troops Take Key Georgian Town

Thank you so much for your time, sir.

NPR: The U.N., the U.S. and the Middle East