lifetime

名词 lifetime:

1. the period during which something is functional (as between birth and death)
   同义词：life, life-time, lifespan

1. Could you reconcile yourself to a lifetime of unemployment?
   你能甘心一辈子失业吗?
2. The government is unlikely to get the bill through within (the lifetime of) this Parliament.
   政府不大可能在本届国会(会期)内通过该项法案。
3. He could not but look up to the sky and sigh deeply when his lifetime of frustrations passed through his mind.
   想起自己坎坷的一生，他不由仰天长叹。
4. He is a legend in his lifetime for his scientific discoveries.
   他的科学发现使他一生成为传奇人物。
5. It's a once in a lifetime chance.
   这是一生难得的机会。
6. A lifetime guarantee; lifetime membership.
   终身保障; 终身会员资格
7. I doubt if there will be a female president in this country in my lifetime.
   我怀疑在我有生之年这个国家会不会出现一位女总统。

life.time

n.（名词）
The period of time during which an individual is alive.
一生：一个人生存的一段时间
The period of time during which property, an object, a process, or a phenomenon exists or functions.
存在期，有效期：某种性质、物体、过程或现象存在或起作用的一段时间
n.attributive.（定语名词）
Often used to modify another noun:
终生：经常用来修饰另一个名词：
例句：
a lifetime guarantee; lifetime membership.
终身保障；终身会员资格