declaration的动词是declare。
（1）to say something officially or publicly公布，宣布，宣告
例如：The government has declared a state of emergency.
政府已宣布进入紧急状态。
（2）to state something firmly and clearly表明，宣称，断言
例如：He declared that he was in love with her.
他声称他已爱上她。
（3）to tell the tax authorities how much money you have earned申报收益
例如：All income must be declared.
所有收益必须申报。
（4）to tell customs officers（=at the border of a country）that you are carrying goods on which you should pay tax申报应缴纳物品
例如：Do you have anything to declare?
你有什么要申报的吗
（5）to decide to end your innings before all your players have batted在击球员还未全部出局时宣布结束赛局，宣布停止击球
