N-UNCOUNT
只在短期内有用之物;（短期内有用之物的）收藏品
Ephemera is things people collect such as old postcards, posters, and bus tickets, which were only intended to last a short time when they were produced.
例句
...tickets and other printed ephemera.
票据和其他短时效的印刷品
...Victorian ephemera.
维多利亚时期短时效用品的收藏