Terms for subject Rhetoric containing learned

English	Russian
as soon as we learn how to	как только мы изучим, как (+ inf. Alex_Odeychuk)
I learned from experience that	на собственном опыте узнал, что (Alex_Odeychuk)
it was learned through word-of-mouth that	по слухам (Alex_Odeychuk)
it was learned through word-of-mouth that	по слухам стало известно, что (CNN Alex_Odeychuk)
learn the bitter truth	узнать горькую правду (Alex_Odeychuk)
learned men	учёные мужи (Alex_Odeychuk)
we will learn from this	это будет нам уроком (CNN, 2021 Alex_Odeychuk)