waistcoat
noun [ C ] UK uk/ˈweɪs.kəʊt/ /ˈwes.kət/ us/ˈwes.kət/ /ˈweɪs.koʊt/ (US vest)
西服背心;马甲
a piece of clothing that covers the upper body but not the arms and usually has buttons down the front, worn over a shirt
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