Russians have a deep love for their own language and carry large chunks of memorized poetry in their heads, while Italian politicians tend to elaborate speech that would seem old-fashioned to most English speakers.

memorized ：过去分词作定语，修饰 poetry。“牢记在心的；熟背的”。

这里，完全体现了 “过去分词表被动和完成” 的两大特征。