A famous scientist at the blackboard with formulasA famous scientist at the blackboard with formulas
A black-and-white book lies next to a candle and a clockA black-and-white book lies next to a candle and a clock
The inscription of the name of the rock band ac/dcThe inscription of the name of the rock band AC/DC
То, что образовалось из чего-н.. Обучение, просвещение. Совокупность знаний, полученных специальным обучением.