ephemera

The collector specialized in historical political ephemera, such as campaign buttons and old pamphlets.

(Chinese) 这位收藏家专门收藏历史性的政治临时物品，如竞选徽章和旧小册子。

A museum of pop culture might display concert tickets and backstage passes as examples of modern ephemera.

(Chinese) 流行文化博物馆可能会展示音乐会门票和后台通行证，作为现代暂时性物品的例子。