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单词 half-life
释义

half-life

​noun countable ​physics
UK
Word Forms
singularhalf-life
pluralhalf-lives
DEFINITIONS1
  1. 1
    the amount of time that is needed for a substance to lose one half of its radioactivity
    Synonyms and related words
    Radioactivity and radiation
    alpha particle
    atomic
    becquerel

half-life

​noun countable ​physics
US
Word Forms
singularhalf-life
pluralhalf-lives
DEFINITIONS1
  1. 1
    the amount of time that is needed for a substance to lose one half of its radioactivity
    Synonyms and related words
    Radioactivity and radiation
    alpha particle
    atomic
    becquerel
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更新时间：2026/9/12 4:52:48