longevity          
noun [ U ]  formal uk/lɒnˈdʒev.ə.ti/ us/lɑːnˈdʒev.ə.t̬i/
C2 长寿
living for a long time
  To what do you attribute your longevity? 你的长寿归功于哪些因素? 
  长期受欢迎
remaining popular or useful for a long time
  For longevity in car design, you really need to keep it simple. 为了让汽车设计延续长久,你真的必须保持简单。