placard

Compared meaning: a public written notice or sign (noun).

比较义项：张贴或展示在公共场所的招贴、告示（名词）。

• poster

  Refers to a printed, often decorative sheet advertising an event, product, or artwork, typically pasted or pinned on a wall; suggests visual design and promotion rather than protest.

  指印刷的、通常带有装饰性的宣传页，用来宣传活动、产品或艺术作品，一般贴在墙上；强调视觉设计和宣传，而非抗议。

  The band's new poster hung in every record store window downtown.

  这支乐队的新海报挂在市中心每家唱片店的橱窗里。

• placard 本词

  Refers to a sign, often handwritten, that is carried or held up in public, usually to express a message, protest, or demand rather than to advertise.

  指一块标语牌，常为手写，在公共场合被举着或拿着展示，通常用来表达诉求、抗议或要求，而非用于宣传。

  Protesters raised their placards outside the city hall steps.

  抗议者们在市政厅的台阶外举起了他们的标语牌。

Poster and placard are both public notices, but poster is a printed, often decorative sheet used for advertising or decoration, usually pasted on a wall. Placard is a sign, often handwritten, that people carry or hold up, usually to show a message or protest.

两者都指公开张贴或展示的书面告示，但 poster 通常指印刷精美、用于宣传或装饰的招贴画，常贴在墙上；placard 则多指手写或简易制作的标语牌，常在游行、抗议或展示场合被举着或立着展示，语气更强调传达信息或诉求。