Eternal Ephemera永恒的生命
Ephemera sp蜉蝣
ephemerae ephemera的复数
The Ephemera蜉蝣一个人生的象征;蜉蝣
Ephemera orientalis方蜉蝣
Stoic Ephemera寡欲短命客
American Broadsides and Ephemera美国早期平面印刷品
N-UNCOUNT（不可数名词） 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（复数型名词） 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。