N-UNCOUNT You can refer to things which last for only a short time as ephemera. 昙花一现之物; 朝生暮死之物 [文学性]
N-PLURAL Ephemera are things people collect such as old postcards, posters, and bus tickets, which were only intended to last a short time when they were produced. (明信片、票据等)短效物收藏品 [oft adj N]
...tickets and other printed ephemera.
...票据和其它短时效的印刷藏品。
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