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单词 lifetime
释义 lifetime
I. \ˈ ̷ ̷ˌ ̷ ̷\ noun
Etymology: Middle English liftime, from lif life + time — more at life, time
1. : the time that a life continues : the duration of the existence of a living being or a thing
 < a lifetime of writing nonfiction — Stuart Chase >
 < these edifices … possess only a limited lifetime — Osbert Sitwell >
 < during its lifetime the university has absorbed several other institutions — American Guide Series: Maryland >
2.
 a. : the duration of the existence of an ion or subatomic particle
 b. : half-life
II. adjective
Etymology: lifetime, noun
1. : lifelong
 < a lifetime love affair with books >
2. : of long duration or continuance
 < lifetime legislation >
3. : measured or achieved over the span of a career
 < a baseball player's lifetime batting average >
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更新时间:2024/11/11 18:05:04