剑桥词典a large piece of card , paper , etc. with a message written or printed on it, often carried in public places by people who are complaining about something 佈告；標語牌 Demonstrators marched past holding /waving placards that said "Send food , not missiles !" 示威者擧著／揮動著標語牌遊行，上麪寫著“要食物，不要導彈”。 返回 placard