The four modes that we meet up with both in Anglo-American folk song and fiddle tunes are the Ionian (major scale), Mixolydian, Dorian, and Aeolian (natural minor scale).

我们在美国民歌和提琴曲中都会遇到四种式，它们分别是艾奥利安式（大音阶）、米索利地安式、多里安式和伊奥尼安式（自然小音阶）。