After the Greeks laid out their fifths and fourths and whole steps, they had these little leftovers.

当希腊人安排好,五度音程,四度音程和全音级后,他们还有一些剩余

耶鲁公开课 - 聆听音乐课程节选

They filled in the octave up above and then they filled in the fifth and then they filled in the fourth and then they came down a whole step and then they went up a fourth from that whole step and then up a fourth from that, and they were filling in in this fashion.

他们填写了八度音程,然后填写了五度音程,又填写了四度音程,然后下降一个全音级,又从那个全音级上升四度音程,然后再上升四度音程,他们就是照这样填写

耶鲁公开课 - 聆听音乐课程节选