1. 宣布;宣言;公告
    A declaration is an official announcement or statement.

declaration的近义词

    e.g. They will sign the declaration tomorrow...
           他们明天将签署这份公告。
    e.g. The opening speeches sounded more like declarations of war than offerings of peace.
           开场的几段讲话听上去更像是战争宣言而不是和平倡议。

2. 宣称;声明;表白
    A declaration is a firm, emphatic statement which shows that you have no doubts about what you are saying.

    e.g. She needed time to adjust to Clive's declaration.
           她需要时间来适应克莱夫的表白。
    e.g. ...declarations of undying love.
           至死不渝之爱的告白

3. (可用作法庭证据的）书面声明;报单
    A declaration is a written statement about something which you have signed and which can be used as evidence in a court of law.

    e.g. On the customs declaration, the sender labeled the freight as agricultural machinery...
           在报关单上，寄货人将货物列为农用机械。
    e.g. They will ask you to sign a declaration allowing your doctor to disclose your medical details.
           他们将要求你签署一份允许医生透露你的身体健康状况的书面声明。