两三个

例句：

1. 1. We need two more volunteers to help us with the project.
   我们需要再增加两名志愿者来帮助我们的项目。
2. 2. I have three books on my shelf.
   我书架上有三本书。
3. 3. There are two students in our class.
   我们班有两名学生。