第三课：音级

Notice that the subdominant is the same distance below the tonic as the dominant is above it. (a generic fifth).
（注意下属音和第一个主音的距离，与属音和最后一个主音的距离是相等的（纯五度））
The prefix sub is Latin for “under” or “beneath”.
（前缀sub在拉丁语中的意思是下面，在……之下）

The third note is called the mediant since it is in the middle of the tonic and dominant.
（第三个音位于主音和属音的中间，所以叫做中音）
Likewise, the sixth note is called the submediant since it is in the middle of the upper tonic and subdominant.
（同样，第六个音位于上主音和下属音的中间，所以叫做下中音）
The second note is called the supertonic. Super is Latin for “above”.
（第二个音叫做上主音，super在拉丁语中的意思是在……之上）