sir /sɜː/ CET4 TEM4

• 1. 

  N-VOC People sometimes say sir as a polite way of addressing a man whose name they do not know, or an older man. For example, a shop assistant might address a male customer as sir. 先生 (对男性的客气称呼) [礼貌]

  例：

  Excuse me sir, but would you mind telling me what sort of car that is?

  对不起，先生，您能告诉我那是什么样的汽车吗？

• 2. 

  N-TITLE Sir is the title used in front of the name of a knight or baronet. (爵士或从男爵名字前的头衔) 爵士

  例：

  She introduced me to Sir Tobias and Lady Clarke.

  她把我介绍给托拜厄斯爵士和克拉克夫人。

• 3. 

  CONVENTION You use the expression Dear Sir at the beginning of a formal letter or a business letter when you are writing to a man. 敬启者 (常用于正式函件或商务函件)

  例：

  Dear Sir, Enclosed is a copy of my résumé for your consideration.

  敬启者，兹附上我的简历一份，请予以考虑。