declare

Compared meaning: to state something formally and publicly (verb).

比较义项：正式宣布，宣告（动词）。

• announce

  Used for making news or information public to an audience; neutral in tone and common in media or official statements; does not imply firmness or legal formality.

  用于向公众公布消息或信息；语气中性，常见于媒体和官方声明；不强调坚定语气或法律上的正式性。

  The company will announce its results tomorrow morning.

  该公司将于明天上午宣布其业绩。

• declare 本词

  Used for firm, formal statements that often carry legal or official weight, such as customs or court declarations, or emphatic assertions; stresses seriousness rather than simply sharing news.

  用于郑重、正式的声明，常带有法律或官方分量，例如海关申报或法庭陈述，也可用于坚定的表态；强调严肃性，而不只是发布消息。

  Travelers must declare items over a certain value at customs.

  旅客必须向海关申报超过一定价值的物品。

Announce and declare both mean to formally say something so people know it. Announce is more neutral, focused on making news public, common in media or official statements. Declare is more solemn and firm, often with legal or official weight, or for strong, emphatic statements.

两词都指正式地把某件事说出来让人知道，但语气不同：announce 更中性，侧重把消息公开发布给公众；declare 语气更郑重、坚定，常带有法律或官方分量。