She speaks what Yeats calls in his general title for this group of poems Words for Music Perhaps.

她说的话，也即是这一组诗的名字,叫做可以配乐的诗。

耶鲁公开课 - 现代诗歌课程节选

It was the setting of a poem by Friedrich Schiller called-- Ode to Joy?

这也是弗里德里希·席勒的组诗,叫做,欢乐颂

耶鲁公开课 - 聆听音乐课程节选