translation.en: And the basic chords were the ones we still have with us, the triads, either the major one, which we think is happy, or the minor one, which we perceive as sad.
translation.zh: 基本的和旋，就是现在我们还可以看到的， 三和弦， 不管是大三和弦 我们认为它代表愉快， 还是小三和弦 我们把它理解为忧伤。