placard

标语牌、举牌

Protesters waved placards demanding better working conditions.

抗议者挥著标语牌，要求改善工作条件。

布告、告示、海报

A placard on the door announced that the store had closed.

门上的告示写著这家店已经结束营业。

说明牌、标示牌

Each painting has a small placard explaining its history.

每幅画旁都有一块小说明牌介绍它的历史。

张贴告示于、贴海报于

Activists placarded the whole neighborhood overnight.

运动人士一夜之间在整个社区贴满了海报。

以海报宣告、张贴公告正式

The new regulations were placarded outside the town hall.

新规定以公告形式张贴在市政厅外。