prevalence

• 名词，指某事物广泛存在或频繁发生的状态，常用于一般语境中描述某事物出现的普遍程度；在流行病学中，指某一特定时点一定人群中患某种疾病或状态的比例。

A noun referring to the condition of being widespread or common, often used in general contexts to describe how frequent something is, and in epidemiology to denote the proportion of a population affected by a specific condition at a given time.

不可数

1. General WidespreadnessB2formal

   The quality of being common or widespread at a particular time or in a particular place.

   普遍性

   • The prevalence of smartphones has changed how we communicate.
   • There is a high prevalence of obesity in many developed countries.
   • The prevalence of this belief varies across different cultures.

   同义词commonnesscurrencyfrequencypervasivenessubiquityuniversality

   反义词rarityscarcity

2. Epidemiological MeasureC1formalmedical

   The proportion of a population found to have a specific condition (typically a disease or risk factor) at a given time.

   患病率

   • The study measured the prevalence of diabetes in adults over 50.
   • Public health officials track the prevalence of infectious diseases.
   • The prevalence rate of the virus decreased after the vaccination campaign.

3. Numerical SuperiorityC1formal

   A state of being greater in number or amount compared to something else.

   数量优势

   • The prevalence of one species over another can affect the ecosystem.
   • There is a prevalence of male participants in the study.
   • The prevalence of errors in the data was concerning.

   同义词ascendancydominancepredominancepreponderancesuperiority

   反义词inferiorityrarityscarcity