Remember the other people, the octaves had been enunciated, the triads had been enunciated.

记住其他人，八度音也曾发明过，三元组也被发现过。

麻省理工公开课 - 固态化学导论课程节选

He talked about octaves.

他谈论八度音。

麻省理工公开课 - 固态化学导论课程节选

So he's coming up initially just through octaves.

开始的时候乐曲按着八度音阶升高

耶鲁公开课 - 聆听音乐课程节选