名词
中文翻译：一
同义词：
['single', 'one', 'unit', 'single-unit']
例句：
-
1. I have one book in my bag.
我包里有一本书。
-
2. She has one sister and one brother.
她有一个姐姐和一个哥哥。
-
3. There are three people in the room. One is a doctor, one is a nurse, and one is a student.
房间里有三个人。一个是医生，一个是护士，还有一个是学生。