借书证

例句：

1. 1. To get a library card, you need to register at the library.
   要获得图书馆卡，你需要在图书馆注册。
2. 2. The library permits only students over 18 years old to use the reading room.
   图书馆只允许18岁以上的学生使用阅览室。
3. 3. The library has a large collection of books and is a great place for people to borrow books.
   图书馆藏书丰富，是人们借阅书籍的好地方。