ephemeralKK [ɪˋfɛmɚəl] /ɪˈfɛmɚəl/發音形容詞1短暫的、轉瞬即逝的、曇花一現的偏正式Fame on social media is often ephemeral and easily forgotten.社群媒體上的名氣往往轉瞬即逝,很快就被遺忘。2朝生暮死的、生命週期極短的生物學These ephemeral insects live for only a single day.這些朝生暮死的昆蟲只能活一天。