四度音阶

例句：

1. 1. The melodyof the song is in the fourth degree.
   这首歌的旋律是四度音阶。
2. 2.The musician played a beautiful piece of musicwith perfect fourth-degree intervals.
   这位音乐家演奏了一首完美的四度音程音乐作品。
3. 3. In classical music, the fourthdegree is often used to create a senseof tension and release.
   在古典音乐中，第四度音阶常常被用来创造紧张感和释放感。