英语翻译ˎ̥If the book you want is out,you may ask for

英语翻译
ˎ̥If the book you want is out,you may ask for it to be called back for you,and if ou pay　the cost of sending a postcard,the librarian will　 write to you,and let you know when the book you 　want has been returned and is ready for you to pick up.