announce
announce(宣布,正式公开,通常针对大众,较中性)
declare
declare(宣告,语气更强,含权威性和确定性:declare independence/war/a state of emergency = 宣布独立/战争/紧急状态)
The Minister of Health announced a new national screening programme for early detection of diabetes.
卫生部长宣布了一项用于糖尿病早期检测的新国家筛查计划。
The World Health Organisation declared the outbreak a public health emergency of international concern.
世界卫生组织宣布这次疫情为国际关注的突发公共卫生事件。