noun🔗Share固定旋律, 主旋律。 A preexisting melody forming the basis of a polyphonic composition."The student's composition used a simple cantus firmus as the foundation for their complex polyphonic piece. "这名学生的作曲使用了一段简单的固定旋律作为他们复杂复调作品的基础。musicChat with AIVocabulary GamePractice Reading