A 15-year lifespan is not uncommon for a dog.对于狗来说, 十五年的寿命并非罕见。

A fox's natural lifespan could be ten years.狐狸的正常寿命可达十年。

They have extended the potential lifespan of humanity everywhere.它们已经延长了各地人们的潜在寿命。

Most boilers have a lifespan of 15 to 20 years.大多数家用热水器的使用期限为十五至二十年。

This job had a planned lifespan of five years.这个职位的有效期计划为五年。