Appreciate the couplet of this poem from two aspects: expression technique and expression effect.

Zhuan Xu is a famous sentence that has been recited all the time. Please appreciate it from the perspective of expression and effect.

answer

Using rhetorical devices such as personification and duality, the heartless scene is endowed with spiritual and vivid images. It is also necessary to write moving scenes with hearing, static scenes with vision, and combine dynamic and static scenes to set off from top to bottom.