transience /ˈtrænzɪəns/

• 1. 

  N-UNCOUNT If you talk about the transience of a situation, you mean that it lasts only a short time or is constantly changing. 稍纵即逝 [正式]

  例：

  ...the superficiality and transience of the club scene.

  ...这个俱乐部现场的肤浅和稍纵即逝。