swan song

名词 swan song:

1. a final performance or effort (especially before retirement)
   同义词：last hurrah

1. All the tickets have been sold for the singer's performance in Paris this week-the public clearly believes that this will be her swan song.
   这位歌唱家本星期在巴黎演唱的全部门票都销售一空——显然，公众认为这将是她最后一次告别演出。