Strips of leather or cord which are pasted on to the back of a book before it is covered.
Mid 19th century; earliest use found in John Neal (1793–1876), author and women's rights activist.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。