Arts Undeclared未申报的艺术
Design Undeclared设计
undeclared labour未申报的劳工
undeclared argument未声明的参数
undeclared interface未声明的接口;未声明接口
Science Undeclared理学
Education Undeclared教育
"fighting an undeclared war"
ADJ（形容词） not announced or acknowledged publicly 未公开宣布的