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life expectancy
noun [C/U]
singularlife expectancy
plurallife expectancies
  1. 1
    the length of time that someone is likely to live (人的)预期寿命
     Synonyms and related words
    General words for life: life, lifespan, lifetime...
  2. 2
    the length of time that something lasts or remains useful 维持期;使用期;有效期
     Synonyms and related words

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