jacket的音标为【英/ˈdʒækɪt/】【美/ˈdʒækɪt/】
具体解释
1、夹克衫；短上衣：a piece of clothing worn on the top half of the body over a shirt, etc.that has sleeves and fastens down the front;a short,light coat；a denim/tweed jacket斜纹布/花呢夹克衫/I have to wear a jacket and tie to work.我上班得穿短上衣打领带。
2、（书籍通常带有图案或画面的）护封，书套a loose paper cover for a book,usually with a design or picture on it
3、（热水管的）保温套，绝热罩an outer cover around a hot water pipe,etc.,for example to reduce loss of heat
4、(BrE)烤过的土豆的皮the skin of a baked potato；potatoes baked in their jackets带皮烤的土豆
例句
That jacket was a really good buy.那件夹克确实买得很划算。
The book jacket is an important component part of the book design.护封是书籍装帧的一个重要的组成部分。
Temperature protection jacket three way ball valve employs the design of one piece body,being impact in structure and excellent in temperature protection effect.保温夹套三通球阀采用整体结构设计，结构紧凑，保温效果好，密封可靠。