parameter
noun [ C usually plural ] uk/pəˈræm.ɪ.tər/ us/pəˈræm.ə.t̬ɚ/
限定因素;界限;范围;规范
a set of facts or a fixed limit that establishes or limits how something can or must happen or be done
The researchers must keep within the parameters of the experiment. 研究员必须在试验既定的范围内进行研究。
The central office sets/establishes the parameters that guide policy at the local level. 中央办公室制定规范，指导地方政策。