这样大概经过了30秒的样子，就是那个主音和弦。

That held for about thirty seconds, that tonic chord.

youdao

经过多次改造， % 到了元代，这类乐器基本成熟，它的主要组成部分是弓和弦。

(v/o) ) After many times of adjustments, this type of musical instruments was quite developed in Yuan Dynasty. It mainly consisted of the bow and the strings.

youdao

经过多次改造， % 到了元代，这类乐器基本成熟，它的主要组成部分是弓和弦。

(v/o) ) After many times of adjustments, this type of musical instruments was quite developed in Yuan Dynasty. It mainly consisted of the bow and the strings.

youdao