1. The average Quarren lifespan is 79 standard years. 夸润人的平均寿命是79个标准年。
2. History teaches us that every problem has a lifespan, No problem is permanent. 历史教育我们，每个问题都有它的周期，没有问题是永久的。
3. Today I saw a pair of feet, maybe it will be the most miserable pair I ever saw during my lifespan. Such a grievous and pathetic pair. 今天在西藏路上我看见了一双脚，也许它会是我一生中见的最不幸的一双脚，让人多么揪心、那么悲悯的一双脚。
英英解释
n.
1. the period during which something is functional (as between birth and death)
