AN

例句：

1. 1. 一个；一
   用于数词后，表示数量
2. 1. The teacher asked for one student to answer the question.
   老师请一位学生回答这个问题。
3. 2. This is a unique design that only a few people can appreciate.
   这是一个独特的设计，只有少数人能够欣赏。
4. 3.He was the only one who could solve the problem.
   他是唯一一个能够解决这个问题的人。