The marketing team worried that the campaign's evanescent buzz would fade before the product launch.

行銷團隊擔心這波活動轉瞬即逝的熱度會在產品上市前就消退。

Investors were reminded that the stock's evanescent gains disappeared within a single trading week.

投資人被提醒，這檔股票轉瞬即逝的漲幅在一週交易內就消失了。

Our tour guide said the evanescent glow over the harbor lasts only a few minutes.

我們的導遊說，港口上空那轉瞬即逝的光芒只會持續幾分鐘。