used to introduce a statement that says the opposite of the last one :
'It must have been terrible.' 'On the contrary, I enjoyed every minute.'
used to introduce a statement that says the opposite of the last one :
'It must have been terrible.' 'On the contrary, I enjoyed every minute.'
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005