noun🔗Share四音列，四音音组 Any set of four different pitch classes."To help her remember the notes, the music teacher explained that scales are often constructed from two tetrachords separated by a whole step. "为了帮助她记住音符，音乐老师解释说，音阶通常由两个四音列组成，这两个四音列之间用一个全音隔开。musicsoundtechnicalmathChat with AIVocabulary GamePractice Reading
noun🔗Share四音音列，四音列。 A series of four sounds, forming a scale of two-and-a-half tones."In music class, we learned how ancient Greek scales were built from tetrachords, groups of four notes spanning two and a half tones. "在音乐课上，我们学习了古希腊音阶是如何由四音列构成的，它们是由四个音符组成，跨越两个半音的音程。musicsoundChat with AIVocabulary GamePractice Reading
