Unique in that:
Poetry needs rational language; However, rational language must be refined and artistic.
Poetry needs irrational language; Irrational language is almost unique to poetry; The artistry of poetic language lies in the creation of irrational language to a great extent.
Poetry needs more rational combination and clever use of rational language and irrational language; If you use it well, from a linguistic point of view, you can write the best poems.