Vocabulary
叹
tàn
to sigh; to exclaim
In a story
许静宜把手机放在桌上,叹了口气。Xu Jingyi put her phone down on the desk and sighed.第二份报告 · The Second Report · HSK 6

Learn it in the app
Save a word while you read and it comes back as a flashcard, read aloud, when it is due.