书皮

例句：

1. 1.The book has a beautiful cover design.
   这本书有一个漂亮的封面设计。
2. 2. She carefully wrapped the book in its cover.
   她小心地用书的封面包裹着书。
3. 3.The old books were stored in dusty covers.
   旧书被存放在灰尘覆盖的封面中。