生物医药大词典
英文: A waistcoat; a vest.
中文: 紧身背心；马甲英文: To protect himself, Ruiz used to wear a bulletproof vest under his suit jacket, but the vest was bulky and hot.
中文: 为了保护自己，儒兹曾经在他的西装外套下穿一件防弹背心，不过这个背心又大又热。英文: He only wears a vest in the room.
中文: 他在家里只穿了一件背心。英文: He wore a woolen vest beneath his shirt.
中文: 他衬衫下面穿了件毛背心。英文: Jimmy is wearing a vest under a coat.
中文: 吉米在上装里面穿着一件背心。