Translate the following passage into Chinese. As you discover information and opinions on your topic, you should keep track of sources that you may use for your paper. A record of such sources is called a working bibliography. Your preliminary read­ing will probably provide the first titles for this list. Other titles will emerge when you consult reference works and the library's central cat­alog and when you explore the Internet. If you read carefully through the bibliography and notes of each work you consult, more often than not you will discover additional important sources. Your working bibliography will frequently change during your research as you add titles and eliminate those that do not prove useful and as you probe and emphasize some aspects of your subject in preference to others. The working bibliography will eventually evolve into the list of works cited that appears at the end of the research paper. To summ up. if compiled with care and attention, the working bibliography will be invaluable to you throughout the preparation of your paper. It will, on the one hand, function as an efficient tool for finding and acquiring information and ideas and, on the other, provide all the data you will need for your list of works cited.