It gives you a sense of how ritornello form can inform this particular rondo.

给了直观的感受 利都奈洛式如何能够形成的。

It could also be a sort of slow rondo.

还可以是慢速的。

I even gave you the text of a rondo by Guillaume Du Fay that goes all the way back in to the fifteenth century.

我甚至列了纪尧姆·迪费写的的歌词而这要追溯到十五世纪。