adj.未申报的，未声明的，未承认的

She has an undeclared major at the university, exploring different subjects before settling on one.
她在大学里还没有确定专业，正在探索不同科目，以便选择一个。
The politician's undeclared income raised suspicions among the public.
这位政客未申报的收入引起了公众的怀疑。
There are several undeclared allergens in this food product, which could pose a risk to consumers.
这种食品中含有一些未声明的过敏原，可能会对消费者构成风险。
His undeclared support for the opposition led to his dismissal from the party.
他暗中支持反对派的行为导致他被政党开除。
The company was fined for failing to declare all its undeclared exports.
该公司因未申报所有未公开出口商品而被罚款。
The customs officer detected undeclared jewelry in the traveler's luggage.
海关官员在旅客的行李中发现了未申报的珠宝。
The undeclared war between the two countries has been going on for years.
两国之间的未宣战战争已经持续了多年。
He had an undeclared conflict of interest in the business deal.
他在商业交易中存在未公开的利益冲突。
The tax authorities are investigating undeclared properties in offshore accounts.
税务部门正在调查离岸账户中的未申报财产。
The candidate's undeclared stance on key issues made it difficult for voters to decide.
候选人对关键问题的未明确立场使得选民难以做出决定。