1N-VAR [oft with poss](人、動植物的)壽命,預期生命期限 The lifespan of a person, animal, or plant is the period of time for which they live or are normally expected to live. (人、動植物的)壽命,預期生命期限
A 15-year lifespan is not uncommon for a dog.
15年的壽命對狗而言是比較常見的。
They have extended the potential life span of humanity everywhere.
世界各地人類的預期壽命均有所延長。
2N-COUNT [oft with poss](産品等的)預期使用期限;(組織、想法等的)預期存在期限 The lifespan of a product, organization, or idea is the period of time for which it is expected to work properly or to last. (産品等的)預期使用期限;(組織、想法等的)預期存在期限
Most boilers have a lifespan of 15 to 20 years. [+ of]