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短上衣；夹克衫
A jacket is a short coat with long sleeves.
例句
...a black leather jacket.
黑色皮夹克
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（带皮烤土豆的）土豆皮
Potatoes baked in their jackets are baked with their skin on.
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（书籍的）护封，书套
The jacket of a book is the paper cover that protects the book.
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唱片套
A record jacket is the cover in which a record is kept.