Cách sử dụng
A preface is an introduction to a book or other piece of writing. It usually comes before the actual content of the writing and gives the reader some background information or an explanation of the author's purpose for writing the book. For example, if you're reading a novel, the preface might tell you about the author's inspiration for the story or how they came up with the characters. If you're writing something yourself, the preface is a good place to explain your own motivations for writing or to acknowledge anyone who helped you along the way. The preface is an optional part of a book, but it can be helpful in providing context and making the reading experience more interesting and meaningful.