汉语的序数是由“第+基数词”组合而成的数量词组来表示的。《现代汉语词典》(中国社会科学院语言研究所词典编辑室编,2005第5版)把“第一”作为词收入其中,这是由于“第一”除了序数意义之外,还产生了“冠军(他在比赛中名列第一)”、“最重要(百年大计,质量第一)”等新意义。按照词组转化成词必须在词与词的组合意义基础上产生不可分割的“特异 The ordinal number of Chinese is represented by the quantitative phrase composed of ”the first base radix “. The Dictionary of Modern Chinese Dictionary, edited by Institute of Language, Chinese Academy of Social Sciences, 5th Edition, 2005, takes ”first“ as a word, because ”first“ means, in addition to ordinal meaning Produced ”champion (he ranked first in the competition) “, ”the most important (a hundred years plan, quality first)“ and other new meaning. In accordance with the phrases into words must be word and word combination of meaning based on the indivisible ”special"