“公开宣布的”常见英文表达有 publicly announced 或 openly declared。
publicly announced：侧重于以公开的方式、面向大众进行宣布这一行为，强调宣布的范围和公开性。例如：The company made a publicly announced decision to expand its business.（该公司公开宣布了拓展业务的决定。 ）
openly declared：更强调态度上的公开、毫不隐瞒地声明，突出一种坦率、直白的表达。例如：He openly declared his support for the new policy.（他公开宣布支持这项新政策。 ）