factor/ˋfæktɚ; ˈfæktə/n [C]1 one of several things that influence or cause a situation 因素: +in Vaccination is an important factor in improving the nation's health. 接种疫苗是提高国民健康水平的重要因素。social/economic factor Crime is due to economic factors. 犯罪是经济原因造成的。2 a particular position on a scale that measures the strength or effect something has 系数: factor 15 suncream 防晒系数为 15 的防晒霜 3 by a factor of five/ten etc if something increases or decreases by a factor of five, ten etc, it increases or decreases by five times, ten times etc〔增加或减少〕五倍/十倍等