The marketing team worried that the spike in website traffic was only ephemeral.

行銷團隊擔心網站流量的激增只是短暫的現象。

Investors were warned that the stock's sudden rally might prove ephemeral after the earnings report.

投資人被提醒，該股票的突然上漲在財報公布後可能只是曇花一現。

Pop-up shops create an ephemeral experience that encourages travelers to buy souvenirs immediately.

快閃店營造出轉瞬即逝的體驗，促使旅客立刻購買紀念品。