柯林斯詞典ordinal /???d?n?l/ 1. ADJ denoting a certain position in a sequence of numbers 序數(shù)的2. N ordinal number的縮寫(xiě)→short for ordinal number 返回 ordinal劍橋詞典a number such as 1st, 2nd, 3rd, 4th, that shows the position of something in a list of things 序數(shù)詞 Fifth and 200th are ordinal numbers . 第五（Fifth）和第二百（200th）都是序數(shù)詞。 比較cardinal noun (NUMBER) 返回 ordinal