Русский ⇄ Английский

лбом стенку не прошибешь ударения
посл.	used to mean: you'll never overcome that obstacle, it's too big for you you can't knock down a wall with a pea-shooter
лбом стенку не прошибёшь
общ.	it's no use beating your head against a brick wall
посл.	you can't break down walls by beating your head against them