long-held

refers to a conviction or principle that has been firmly maintained for a long period.

indicates a cherished aspiration or hope that has existed for many years.

давнее стремление

describes an ambition that one has had for a significant amount of time, often a life goal.

описывает стремление, которое человек вынашивал долгое время, часто являющееся целью всей жизни.