n the period during which something is functional (as between birth and death)
n. 一生, 终生
a. 一生的, 终生的
1. A lifetime is a long time to learn new things.
一生是学习新事物的漫长时间。
2. She wants to travel around the world in her lifetime.
她想在一生中环游世界。
3. He saved money for a lifetime of adventures.
他为了充满冒险的一生存钱。