a crucial test that proves the value or success of something
何かの価値や成功を証明する重要なテスト (nanika no kachi ya seikou o shoumei suru juuyou na tesuto)
"The product launch will be the acid test of our new design."
"製品の発売は、私たちの新しいデザインの酸テストとなるでしょう。" (seihin no hatsubai wa, watashitachi no atarashī dezain no **san tesuto** to naru deshou)
to survive a difficult situation
to start a friendship
to take on a lot of responsibility
to accept the results of your actions, whether good or bad
a balance between two conflicting or competing factors
To act without sufficient information or guidance.
