Not yet known — nobody has worked out who this person is or what this thing is. It is the word you use when the identity is genuinely still a blank: an unidentified body, an unidentified illness, an unidentified object in the sky (that is where UFO comes from — Unidentified Flying Object). It has a careful, official sound, and it lives mainly in news reports, police statements, and scientific writing.

Not yet known還不知道nobody has worked out who this person is or what this thing is沒有人查出這個人是誰，或這個東西是什麼It is the word you use這是你會用的字when the identity is genuinely still a blank當身分真的還是一片空白的時候an unidentified body身分不明的屍體an unidentified illness不明的疾病an unidentified object in the sky天空中不明的物體(that is where UFO comes from — Unidentified Flying Object)（UFO就是這樣來的——Unidentified Flying Object）It has a careful, official sound聽起來很謹慎、很正式and it lives mainly in news reports, police statements, and scientific writing主要出現在新聞報導、警方聲明和科學文章裡

Notice the useful difference from anonymous and unnamed. If a newspaper says an unnamed official, someone knows perfectly well who it is and is choosing not to say. Unidentified means the knowledge itself is missing. So 'an unidentified man' is not being protected — he genuinely has not been identified yet.

Notice the useful difference注意一個有用的差別from anonymous and unnamed跟anonymous、unnamed之間的差別If a newspaper says an unnamed official如果報紙說an unnamed officialsomeone knows perfectly well who it is是有人很清楚知道是誰and is choosing not to say只是選擇不說Unidentified meansUnidentified的意思是the knowledge itself is missing這個知識本身就不存在So 'an unidentified man' is not being protected所以「an unidentified man」不是被保護he genuinely has not been identified yet他是真的還沒被查出身分

There is also the softer everyday use, half-joking, for anything you cannot name: an unidentified vegetable in the back of the fridge, an unidentified smell in the corridor.

There is also the softer everyday use還有一種比較輕鬆的日常用法half-joking半開玩笑的for anything you cannot name用在你叫不出名字的東西上an unidentified vegetable in the back of the fridge冰箱深處一個不明的蔬菜an unidentified smell in the corridor走廊上一股不明的味道

And note the built-in 'not yet': it suggests the work of identifying is unfinished, which is why police say a body 'remains unidentified' — the search is still on.

And note the built-in 'not yet'另外注意這個字內建的「還沒」it suggests the work of identifying is unfinished暗示查明身分的工作還沒完成which is why police say a body 'remains unidentified'這就是為什麼警方會說一具屍體「remains unidentified」the search is still on表示搜查還在進行