自然小调natural minor 和声小调：harmonic minor在和声小调等级中，第六级的音程和第三级都比大调主音低半音。HARMONIC MINOROf the three kinds of minor scales, this one is the most fundamental to a sense of the minor KEY. In the harmonic minor scale, the sixth degree as well as third degree is one semitone lower than in its tonic...