( informal ) to learn to do sth well and efficiently :
I spend so much time travelling that I've got packing down to a fine art.
( informal ) to learn to do sth well and efficiently :
I spend so much time travelling that I've got packing down to a fine art.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005