他在房门上挖了一个洞。透过洞眼，他窥测、偷看。

He cut a small hole in the door of his house, and peeped through this hole.

第一节从对“思无邪”这样的基本概念重新阐释，来窥测诗的本质，及其在汉代的嬗变；

Section one re-interpretated the basic concepts like "Thinking Purely", trying to make out the nature of poetry and its evolution in the Han Dynasty.