https://online2.tingclass.net/lesson/shi0529/0009/9907/878.mp3
https://image.tingclass.net/statics/js/2012
swan song 绝笔，最后作品，(艺术家、演员等的) 告别演出，天鹅临死时的哀鸣
This book is believed to be his swan song.
这本书被公认为他的最后一部作品。
Tonight's game is my swan song.
今晚是我的告别之战。
