名詞 commemoration:

1. a ceremony to honor the memory of someone or something
   同義詞：memorialization, memorialisation
2. a recognition of meritorious service
   同義詞：memorial, remembrance

1. People are lining up to buy commemoration stamps.
   人們正在排隊購買紀念郵票。

com.mem.o.ra.tion

n.（名詞）
The act of honoring the memory of or serving as a memorial to someone or something.
紀念儀式：紀念某物、某人或作為紀念物提供給某人、某事的行為
Something that honors or preserves the memory of another.
紀念：對另一事進行紀念或保存記憶的某事