lifespans

英 [ˈlaɪfspænz]

美 [ˈlaɪfˌspænz]

n. 寿命; 可持续年限; 有效期
lifespan的复数

柯林斯词典

N-VAR （人、动植物的）寿命，预期生命期限
Thelifespanof a person, animal, or plant is the period of time for which they live or are normally expected to live.
1. A 15-year lifespan is not uncommon for a dog...
  15年的寿命对狗而言是比较常见的。
2. They have extended the potential life span of humanity everywhere.
  世界各地人类的预期寿命均有所延长。
N-COUNT （产品等的）预期使用期限；（组织、想法等的）预期存在期限
Thelifespanof a product, organization, or idea is the period of time for which it is expected to work properly or to last.
1. Most boilers have a lifespan of 15 to 20 years.
  绝大多数锅炉有15至20年的使用期限。