1.
to be good at sth :
I'm not very strong on dates (= I can't remember the dates of important events) .
2.
to have a lot of sth :
The report was strong on criticism, but short on practical suggestions.
1.
to be good at sth :
I'm not very strong on dates (= I can't remember the dates of important events) .
2.
to have a lot of sth :
The report was strong on criticism, but short on practical suggestions.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005