breathe a sigh of relief
US /briːð ə saɪ əv rɪˈliːf/
UK /briːð ə saɪ əv rɪˈliːf/

1.
鬆一口氣, 如釋重負
to feel relieved after a period of anxiety or worry
:
•
She breathed a sigh of relief when she heard her son was safe.
當她聽說兒子平安無事時,她鬆了一口氣。
•
We all breathed a sigh of relief when the plane landed safely.
當飛機安全著陸時,我們都鬆了一口氣。