劍橋詞典whose name is not known or is being kept secret （名字）未知的，不明的，保密的 Police are investigating the death of an unidentified man whose body was found yesterday . 昨天發(fā)現(xiàn)的一具無名男尸，警方正在調(diào)查該案件。 The airline is currently having merger talks with an unidentified rival . 該航空公司目前正在與一個(gè)未透露身份的對手協(xié)商并購事宜。 也見 UFO 返回 unidentified