“one”的序数词是:first。
“one ”,读音:英[wʌn];美[wʌn]。
1、num. 一个;(数字) 一;(基数) 一,第一;
2、n. 一个人; 一体; 一点钟;独一;
3、pron. 一个人;任何人; 本人,人家;东西。
例句:
1、They had three sons and one daughter.
2、This is the one I like best.
3、She visited one of her cousins.
“first ”,读音:英谨槐[fɜ:st];美[fɜ:rst]。
1、n. 第一;最初;升胡头等;一号;[乐] 高音部;
2、adv. 首次; 最早,最初;宁愿;吵晌拦优先;
3、adj. 第一流的;最初的,最早的;基本的,概要的;高音的。
例句:
1、What were your first impressions of Beijing?
2、First of all she just smiled, then she started to laugh.
3、He was the first to be there.