曲子

例句：

1. 1. The melody of the song is so beautiful that it makes me want to dance.
   这首歌的旋律如此美妙，让我想要跳舞。
2. 2. The composer composed a piece of music for the performance.
   作曲家为演出创作了一首乐曲。
3. 3. The orchestra played several pieces of classical music during the concert.
   管弦乐队在音乐会上演奏了几首古典乐曲。