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新东方-柯林斯雅思备考词典
placard
英 [ˈplækɑːd]
[NOUN]
placards
1. [C 可数名词] 标语牌 , 布告
A placard is a large notice that is carried in a march or displayed in a public place.
双语例句
例：The protesters sang songs and waved placards.
抗议者们唱着歌，挥舞着标语牌。