Tyre Placard轮胎标牌
pictorial placard做宣传的画
The Placard布告上
placard rack海报架
placard n招贴
Anonymous placard匿名揭帖
placard d区域火灾报警装置的标牌
retroreflective placard后向反光性标志牌
placard speed标示速率;标卡限定速度
N-COUNT（可数名词） A placard is a large notice that is carried in a march or displayed in a public place. 标语牌; 布告
The protesters sang songs and waved placards.
抗议者们唱着歌并挥舞标语牌。