a way of deciding whether something is successful or true 决定性考验；严峻的考验 The acid test of a good driver is whether he or she remains calm in an emergency. 在紧急情况下能否保持冷静是对好司机的严峻考验。 🔊🔊 The perception of fairness is the acid test for democracy. 公平感是对民主的严峻考验。 This type of stone is the acid test of a climber’s ability. 这种类型的石头是对攀登者能力的严格考验。
Word Originfiguratively, from the original use which was a test for gold using nitric acid.