This file defines four roles: manager, librarian, student, and visitor.

这个文件定义4个角色：manager、librarian、student和visitor。

youdao

However, the librarian turned down my request with a cold shoulder, saying, "you can't borrow this book, you are not a student here."

然而，馆员拒绝我的请求的冷脸，他说：“你不能借这本书，您还不是我们的学生在这里。”

youdao

However, the librarian turned down my request with a cold shoulder, saying, "you can't borrow this book, you are not a student here."

然而，馆员拒绝我的请求的冷脸，他说：“你不能借这本书，您还不是我们的学生在这里。”

youdao