a crucial test that proves the value or success of something
ключевой тест, который доказывает ценность или успех чего-либо (klyuchevoy test, kotoryy dokazyvayet tsennost' ili uspekh chego-libo)
"The product launch will be the acid test of our new design."
"Запуск продукта станет кислотным тестом нашего нового дизайна." (Zapus produkt stanut **kislotnym testom** nashego novogo dizayna)
to show the necessary ability when faced with a challenge
to impress or amaze someone with beauty or charm
To quickly become good friends and enjoy each other’s compan...
to suffer from a bad experience or mistake
Always stay optimistic, but be ready for any outcome.
to barely have enough money to survive