n. an utterance made by exhaling audibly
n. a sound like a person sighing
v. heave or utter a sigh; breathe deeply and heavily
v. utter with a sigh
n. 叹息
vi. 叹息, 渴望
vt. 叹息着说
1. She let out a sigh of relief when she passed the exam.
她通过考试时松了一口气。
2. He sighed deeply as he watched the rain fall outside.
他深深地叹了口气，看着外面的雨下着。
3. After a long day at work, I always sigh when I get home.
工作了一整天回到家，我总是叹气。