七音音阶

例句：

1. 1. Thepentatonic scale is a fundamental buildingblock for Western music.
   五声音阶是西方音乐的基础构建块。
2. 2. Intraditional Chinese music, theuse of the seven-tonescale is highly valued.
   在传统中国音乐中，使用七声音阶被高度重视。
3. 3. The composer used the pentatonic scale to create a unique soundscape for his piece.
   作曲家使用五声音阶为他的曲子创造了独特的音响效果。