ephemera /ɪˈfɛmərə/

• 1. 

  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]

• 2. 

  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]

  例：

  ...tickets and other printed ephemera.

  ...票据和其它短时效的印刷藏品。