中型八开本

例句：

1. 1. This novel is a great read for those who enjoy middle-sized books.
   这本小说是那些喜欢中等大小书籍的人的绝佳选择。
2. 2.The publisher has released a new edition of the classic novel in this medium-sized paperback format.
   出版社已经以中等大小的平装书格式发布了这部经典小说的新版本。
3. 3.Many students prefer to read their textbooks in this medium-sized paperback size.
   许多学生更喜欢用这种中等大小的平装书来阅读教科书。