использовать благоприятную возможность The secret of his success as a businessman is that, he always knows when he's onto a good thing.
BE ONTO A GOOD THING
Англо-русский перевод BE ONTO A GOOD THING
Мюллер. English-Russian Muller's dictionary bed edition. Англо-Русский словарь Мюллера редакция bed. 2012