ephemerality

1. But the obsession with snapchat on the basis of its ephemerality sells the service short.
   但是如果认为对Snapchat的痴迷只是因为它“阅后即焚”的特色，那显然小看了这项服务。
2. Fashion has the characteristics of equalization, differentiation and ephemerality.
   时尚具有从众性、区分性和转瞬即逝性三个特点。

noun

1. the property of lasting for a very short time

   Synonym:    ephemeralnessfleetingness