无盖

The book was missing its coverless, so I couldn't tell what it was about just by looking at the front.
这本书缺了封面，所以我无法仅凭看前面来判断它是什么。

I always thought that coverless books were less valuable, but now I know that some of them can be quite rare and worth a lot of money.
我一直认为没有封面的书价值较低，但现在我知道有些书相当稀有，价值不菲。

She found an old coverless book in her grandfather's attic, and it turned out to be a first edition of a famous novel.
她在祖父的阁楼上发现了一本旧的无封面书，结果竟然是著名小说的第一版。

The library had a collection of coverless books that were too fragile to be displayed, but they were still available for checkout.
图书馆有一批无封面的书籍，因为太脆弱而无法展示，但仍然可以借阅。

He loved collecting coverless books because they often contained unique inscriptions or signatures from the previous owner.
他喜欢收集无封面的书籍，因为它们常常包含前主人独特的题词或签名。

The bookstore owner told me that coverless books were often overlooked by customers, which made them great bargains.
书店老板告诉我，无封面的书往往被顾客忽视，这使它们成为极好的便宜货。

She was able to restore a coverless book by finding an original cover online and carefully attaching it to the book.
她在网上找到了一本原装封面，并小心地将其贴在书上，从而修复了一本无封面的书。

I once bought a coverless book at a garage sale for only a few dollars, and later discovered that it was a collectible item.
我曾在一次车库拍卖会上以几美元的价格买了一本无封面的书，后来才发现它是一件收藏品。

The coverless book sat on the shelf for years until one day, a curious librarian decided to read it and discovered its hidden treasures.
无封面的书在书架上放了好几年，直到有一天，一位好奇的图书管理员决定阅读它，并发现了它的隐藏宝藏。

He found a coverless book at a flea market and was able to identify it as a rare edition based on the publisher's mark inside.
他在跳蚤市场发现了一本无封面的书，根据内部出版商的标记，他能够确定这是罕见版本。