名词中文翻译
中文翻译：封面
同义词：
['cover', 'coverlet', 'flap', 'flapping', 'flapper']
例句：
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1. The book has an off-cover with a picture of the author on it.
这本书有一个封面，上面有作者的照片。
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2.The off-cover was made of thick leather and had a zipper at the top.
这个封面是用厚实的皮革做的，顶部有一个拉链。
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3. The off-cover is used to protect the pages inside the book from getting dirty.
封面用来保护书页内部不受弄脏。