Reading inside and lending outside is relative, which refers to the way of borrowing books and whether it is allowed to be taken out of the designated place;

Basic set, that is, set, is a noun, similar to the safe inventory of goods;

Entering Tibet refers to a process, that is, the acquisition of books, periodicals, databases and other resources from purchase to becoming the assets of library collections;

Internal reading: refers to reading and consulting only in the library reading room (designated place), and cannot be taken out;

Borrowing: refers to books and other materials that can be borrowed home to read;

Basic collection: it means that the library usually buys 3-5 books (the same kind of books), and always keeps one book as a collection (that is, a collection) except borrowed and rotten books that can be discarded;

Library entry: refers to a process in which books enter the reading area or stacks for readers to borrow after acceptance, classification, cataloging and processing; It can also be simply understood as a book, or resources such as periodicals, newspapers and databases become the assets of library collections.