a thing that is almost impossible to find :
Searching for one man in this city is like looking for a needle in a haystack.
a thing that is almost impossible to find :
Searching for one man in this city is like looking for a needle in a haystack.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005