What I want to point out to you is this part of her letter, the third paragraph here, where she says, "My idea is this."

大家来看,信的第三段,她说，“我认为“

耶鲁公开课 - 1945年后的美国小说课程节选

As soon as Milton describes for us the events in heaven that lead up to the Nativity, he begins the this is the prelude of the poem, it's broken up in to two chunks: the prelude and then what Milton calls the hymn he begins the third stanza of the prelude to his poem with a plea to the Heavenly Muse for inspiration.

弥尔顿一给我们描述引导基督诞生的天堂的事情,他就开始描述,这就是诗歌的开端，分为两部分：,这个开端还有弥尔顿称之为颂歌的部分,他开篇的第三段用了,对天国的缪斯寻求创作灵感的请愿。

耶鲁公开课 - 弥尔顿课程节选