终身

例句：

1. 1. He has lived in this city for a lifetime.
   他在这个城市生活了一辈子。
2. 2. She decided to live a life of simplicity and contentment.
   她决定过一种简单而满足的生活。
3. 3. The couple plans to spend their entire lives together.
   这对夫妇计划共度一生。