形容詞 evanescent:

1. tending to vanish like vapor

1. The joy and moral stimulation of work no longer must be forgotten in the mad chase of evanescent profits.
   務必不能再忘記勞動帶來的喜悅和激勵，而去瘋狂地追逐那轉(zhuǎn)瞬即逝的利潤。

ev.a.nes.cent

adj.（形容詞）
Vanishing or likely to vanish like vapor.See Synonyms at transient
漸漸消失的，消散的：消失的或象煙霧一樣易消散的參見 transient

【引伸】
ev.anes.cently
adv.（副詞）