释义
n.
a coloured summer jacket worn by schoolchildren or sports players as part of a uniform
（中小学生、运动员夏季穿的，作为制服一部分的）彩色夹克衫。
a plain jacket, typically dark blue, not forming part of a suit but considered appropriate for formal wear
（通常为深蓝色、不与裤子配套但被认为可在正式场合穿着的）便上装。
词源
"late 19th cent.: from
