רוסית ⇄ אנגלית

становиться пробным камнем מתח
כלל.	become a touchstone (MichaelBurov); become a touch-stone (MichaelBurov); become a touch stone (MichaelBurov); become an acid test (MichaelBurov); prove to be a touchstone (MichaelBurov); prove to be an acid test (MichaelBurov)