the moment of truth
US /ðə ˈmoʊmənt əv truθ/
UK /ðə ˈmoʊmənt əv truθ/

1.
关键时刻, 真相大白之时
a time when a person or thing is tested, or when a decision has to be made
:
•
After months of preparation, the moment of truth arrived for the young athlete.
经过数月的准备,年轻运动员的关键时刻到来了。
•
The presentation tomorrow will be the moment of truth for our new product.
明天的演示将是我们新产品的关键时刻。