a ship's yellow or quarantine flag (denoting the letter Q), indicating a request for customs clearance when flown alone
(商船上用的)黄旗,检疫旗(代表字母Q,单独悬挂时表示请求海关结关)。
【赛车】 (用以警告赛车手前有漏油或撞坏车辆等危险的)黄色信号旗。
a yellow-flowered iris which grows by water and in marshy places, native to Europe
黄菖蒲,黄鸢尾。