ottava

例句：

1. 1.The ottava was a beautiful piece of music.
   这首乐曲是一首美丽的音乐作品。
2. 2.The ottava was performed by the famous pianist.
   这首乐曲是由著名的钢琴家演奏的。
3. 3. The ottava is considered to be one of the most important works in classical music.
   这首乐曲被认为是古典音乐中最重要的作品之一。