[uncountable] polite and pleasant behaviour that shows respect for people
礼貌；谦恭◆I was treated with great courtesy.
我受到极有礼貌的接待。 ●courtesy of sb/sth (also by courtesy of sb /sth)

1. (usually used in written English 通常用於书面英语) with the official permission of sb/sth and as a favour
   承蒙…的允许（或好意）◆The pictures have been reproduced by courtesy of the British Museum.
   承蒙大英博物馆的允许，复制了这些画。