singular cover

例句：

1. 1. The book has a singular cover thatis unique to its author.
   这本书有一个独特的单数封面，是作者独有的。
2. 2. Themuseum exhibits a singular cover of theancient artifacts.
   博物馆展出了一件古代文物的独一无二的单数封面。
3. 3. Theartist's singular cover design is highlysought after by collectors.
   艺术家的单数封面设计非常受收藏家们的青睐。