柯林斯词典underseal /ˈʌndəˌsiːl/ [英国英语] 1. N a coating of a tar or rubber-based material applied to the underside of a motor vehicle to retard corrosion (给车底涂的)防水材料 (US name undercoat)2. V to apply a coating of underseal to (a motor vehicle) (给车底)涂防水材料 返回 under seal