大森林的早晨歌曲:请高手帮忙翻译这段E文，急急急！谢谢～～

Managers at chains have some leeway in determining bookstore ordering and stocking decisions in their local store. However, with the new superstores featuring up to 100,000 books at a single location, it's obvious that the majority of stocking decisions are made by the chain buyers and subsequent sales results. The buyers sometimes depend on the trade publishers themselves to determine which books to give a chance on the shelves, and despite the huge capacity of these stores, most titles in stock will be backlist or editions of older books, making competition for the remaining spots fierce indeed. On the other hand, trade publishers are very attentive to the demands of chain buyers and will sometimes change the design of a book to ensure that the chain will give it an opportunity on the shelves. A small and ever-shrinking number of independent bookstores will stock books from local authors or small publishers on consignment in a special section for the sake of community relations.
The term "modeling" is used to describe how many copies of a particular title a store will stock. A book modeled for two copies means the store software is continually re-ordering to keep two copies on the shelf. For a chain to continue modeling a book, it needs to achieve average sales of more than one copy per store per year. However, that doesn't mean a chain will give a new title a whole year, or even six months, to start generating those sales. Bookstore chains use sophisticated computer models to analyze sales and predict stocking requirements on a continual basis, so a title that fails to show significant sales early-on will disappear from the shelves within a few months. A chain with 500 superstores would want to see at least 10 copies per week sold across the chain to justify ordering the title for stock. Less than that, it's back to the chain's distribution center and from there a return ticket to the publisher. Some people are surprised that the superstores will stock a title that only sells a couple of copies per store per year, but part of the attraction of a superstore to consumers is the huge number of titles they stock. The chains may prefer to stock strictly fast-moving bestseller titles, but the slower-moving books provide "wallpaper" that's necessary for the ambiance. The best independent bookstores turn over their inventory more often than the chain stores, perhaps three times a year as compared to twice, but those numbers are inflated by bestsellers.