英语中数字1是one,one的序数词是first.
first 英 [fɜːst] 美 [fɝst]
ord.第一,num. 第一;最好的;adj. 最重要的;adv. 首先;首次;pron. 第一(个);第一次
She lost 16 pounds in the first month of her diet.
她节食的第一个月减掉了16磅。
This is the first time she has experienced disappointment.
这是她第一次感受到失望。
First of all, they underestimate themselves.
首先,他们低估了自己的能力;
He was the first to be there.
他是第一个到达那里的。
This is my first crack at cooking.
这是我第一次尝试做饭菜。
The first time I saw seals was in an aquarium.
我第一次看见海豹是在水族馆里。
What were your first impressions of Beijing?
你对北京的最初印象如何?