一二三用英语分别表示为 one, two, three。它们来自古代拉丁语，在英语中有着悠久的历史。例句：

I have one apple, two bananas, and three oranges. 我有一个苹果，两个香蕉和三个橙子。

She can count from one to ten in English. 她会用英语从一数到十。

One, two, three, four, five, once I caught a fish alive. 一二三四五，曾经我捉到一条活鱼。

参考资料：

One, two, three - Wikipedia (https://en.wikipedia.org/wiki/One,_two,_three)

One, two, three - Wiktionary (https://en.wiktionary.org/wiki/one,_two,_three)