And we talked about a triad being a configuration of three pitches where you take the first, the third and the fifth.

三和弦是由三个音高配置成的，你们可选取第一，第三和第五个音。

耶鲁公开课 - 聆听音乐课程节选

We'll be talking about the fact that this is an interval of a third; it spans three letter names a little bit later on.

我们以后会谈到,这其实是个三度音程,它跨越了三个音名

耶鲁公开课 - 聆听音乐课程节选