pythagorean scale的用法和樣例：
例句
- Diatonic seventh chords use the notes of the diatonic scale to add a seventh above the root to triads.
自然七和弦使用自然音階的音，在三和弦上增加根音之上的七音。 - After careful analysis, the author finds that as for the series produced by all the 7 known Wu-yang bone-flutes, all are natural scales containing different numbers of scale steps.
摘要經分析研究，筆者認為已知的七支舞陽骨笛，其所能奏出的音列全為包含不同音數的自然音階。
