Definition
To suddenly understand something that you did not understand before, usually a truth or reality that was previously hidden.
（某人）恍然大悟，頓時看清真相
After years of research, the scientists finally had the scales fall from their eyes and understood the real cause of the disease.
經過多年的研究，科學家們終於恍然大悟，明白了這種疾病的真正原因。
When he saw all the evidence, the scales fell from his eyes, and he realized that he had been deceived all along.
當他看到所有證據時，他恍然大悟，意識到自己一直被欺騙。
As she gained more experiences, the scales fell from her eyes, and her view of the world became clearer.
隨著她獲得了更多的經驗，她恍然大悟，對世界的看法變得更加清晰。