parameter
UK [pə'ræm.ɪ.tər] US [-ə.tˌɚ] noun countable usually plural
■a set of facts or a fixed limit which establishes or limits how something can or must happen or be done 决定因素；界限；范围；规范•The researchers must keep within the parameters of the experiment.研究员必须在实验既定的范围内进行研究。 •The central office sets/establishes the parameters which guide policy at the local level.总部制定规范，指导地方政策。 |