豁然开朗 [- - kāi lǎnɡ]suddenly see the light; be suddenly enlightened; at once become enlightened; suddenly become bright open; suddenly become clear-minded; suddenly dawn upon：
•¶ “她干吗要批评我呢?”他想到这里豁然开朗，心情也舒展了。 Why should she have criticized him， he wondered. Then he suddenly saw the light and began to feel relieved.