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prevalence ['prevələns]    添加到生词本 复制网址
基本释义
  • n. 传播,流行,普及
英英解释

  • 　3个名词解释

    1. the quality of prevailing generally; being widespread
      [例]
      • he was surprised by the prevalence of optimism about the future
    2. (epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population
      3. show all ... ( 3 )