2、将英文文本翻译成中文:A book in the library has an international standard book number (ISBN), title, publisher, year of publication, and one or more authors. (For sake of simplicity assume that author names are unique.) In order to assist with book selections, each book is characterized by a few key words. There are books of which the library has several copies. Each copy can be shelved in a certain place in the library. A place is identified by a hall name and shelf number. The library lends books to readers. Each reader has a reader ID, name, and address. The book’s lending out and return dates are recorded. It is impo