Things are not "made up" in Frost, "not made up" in the sense of imagined, called up out of thin air, like fairies and elves.

弗罗斯特的诗歌里没有编造，没有想象，像仙女和精灵那样的凭空想象。

耶鲁公开课 - 现代诗歌课程节选

It's the story of Aengus' longing and quest for union with a fairy girl whom he desires.

是安古斯渴望，寻求,和一个仙女结合的故事。

耶鲁公开课 - 现代诗歌课程节选