1. The number of books borrowed is the number of times readers borrow books. Book borrowing refers to the number of books borrowed by readers.

2. restrictions. There is no limit to the number of loans, and you can borrow them many times. However, there is a limit to the number of books borrowed. In order to avoid losing numbers or readers' perfunctory reading, the lending institution will stipulate that readers can only borrow two or three books at a time.