- 1
Longevity means living for a long time, or lasting for a long time — you can talk about human longevity (people living longer lives thanks to better medicine), or the longevity of a company, a marriage, or a piece of equipment that keeps working for years. It has a slightly formal, thoughtful feeling — people use it more when discussing life expectancy, careers, or how well-built something is, rather than in casual small talk.
長壽、持久
組成long-（源自拉丁文 longus，長的）加上 -evity（源自拉丁文 aevum，意思是「時代、壽命」）。
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
longevitynoun/lɒnˈd͡ʒɛv.ɪ.ti/
- 1
The quality of being long-lasting, especially of life.
- Grandpa had incredible longevity: he lived to be 105 years old!
- This 142-year-old tiny ex-LNWR SB [signal box, at Batley] is an amazing survivor, probably owing its longevity to its location alongside a level crossing. Indeed it started life as a gate box with the delightful name of Lady Ann's Crossing.
- 2
Duration over time; persistence.
- A ‘postdating’ is an example of the use of a lexical item at a later date than currently recorded and these are important in establishing the longevity of use of a term and whether or not it has become obsolete.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。