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BNC: 2087 COCA: 2825

unknown

adjective
 
/ˌʌnˈnəʊn/
/ˌʌnˈnəʊn/
Idioms
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  1.  
     not known or identified未知的；不详的；未被确认的
    • A previously unknown group claimed responsibility for the bombing.一个以前不为人知的团体声称对爆炸事件负责。
    • He was trying, for some unknown reason, to count the stars.不知何故，他试图数星星。
    • The man's identity remains unknown.这名男子的身份还是个谜。
    • An unknown number of civilians were killed or injured in the attack.袭击中有数量不明的平民伤亡。
    • patients suffering from fevers of unknown origin不明原因发烧的病人
    • unknown to somebody/something a species of insect hitherto unknown to science一种科学上迄今未知的昆虫
    Extra Examples
    • His whereabouts were quite unknown during this period.这一时期他几乎是下落不明。
    • She departed for parts unknown (= nobody knew where she was going).她离开了，不知去了什么地方。
    • These sites remain largely unknown to the British public.这些场所基本上一直不为英国公众所知。
    Oxford Collocations Dictionaryverbs
    • be
    • remain
    adverb
    • completely
    • entirely
    • quite
    • …
    preposition
    • to
    phrases
    • for parts unknown
    • to parts unknown
    • for reasons unknown
    • …
    See full entry
  2.  
     (of people人) not famous or well known不出名的；无名的
    • She was then still relatively unknown.她那时候还不怎么出名。
    • The author is virtually unknown outside Poland.在波兰以外，这位作者实际上鲜为人知。
    • a film with a largely unknown cast演员阵容鲜为人知的电影
    • an unknown actor没有名气的演员
    Oxford Collocations Dictionaryverbs
    • be
    • remain
    adverb
    • completely
    • entirely
    • quite
    • …
    preposition
    • to
    phrases
    • for parts unknown
    • to parts unknown
    • for reasons unknown
    • …
    See full entry
  3.  
     never happening or existing从未发生的；从不存在的
    • unknown in… The disease is as yet unknown in Europe (= there have been no cases there).这种疾病至今尚未在欧洲出现过。
    • it is unknown for somebody/something to do something It was not unknown for people to have to wait several hours (= it happened sometimes).人们得等几个小时的事时有发生。
    • It is virtually unknown for foxes to attack anyone.狐狸袭击任何人几乎是未知的。
    • a period of democratic development unknown in their country until now一段民主发展的时期，在他们的国家里至今还不为人所知
    Oxford Collocations Dictionaryverbs
    • be
    • remain
    adverb
    • completely
    • entirely
    • quite
    • …
    preposition
    • to
    phrases
    • for parts unknown
    • to parts unknown
    • for reasons unknown
    • …
    See full entry
Idioms
an unknown quantity
  1. a person or thing whose qualities or abilities are not yet known未知数（指尚不清楚，有待证实的人或事物）
unknown to somebody
  1. without the person mentioned being aware of it…尚不知道；把…蒙在鼓里
    • Unknown to me, he had already signed the agreement.他背着我已签了协议。

unknown

noun
/ˌʌnˈnəʊn/
/ˌʌnˈnəʊn/
jump to other results
  1. the unknown
     [singular] places or things that are not known about未知的地方（或事物）
    • a journey into the unknown探险之旅
    • a fear of the unknown对未知事物的恐惧
    Extra Examples
    • This action represents a leap into the unknown.这个行动是对未知事物的大胆探索。
    • What the weather will be like on the day is, as always, the great unknown.到时天气会怎样一向都是个未知数。
    Oxford Collocations Dictionaryadjective
    • big
    • great
    verb + unknown
    • explore
    • face
    • step into
    • …
    phrases
    • a journey into the unknown
    • a leap into the unknown
    • a voyage into the unknown
    • …
    See full entry
  2. [countable] a person who is not well known无名者；不出名的人
    • A young unknown played the leading role.演主角的是一个名不见经传的年轻人。
    Extra Examples
    • a cast of virtual unknowns由几乎没什么名气的人组成的演员阵容
    • The championship was won by a complete unknown.一个名不见经传的人赢得了冠军。
    Oxford Collocations Dictionaryadjective
    • complete
    • relative
    • virtual
    • …
    See full entry
  3. [countable] a fact or an influence that is not known不明的情况；未知的因素
    • There are so many unknowns in the proposal.这项提案中的未知数太多了。
  4. [countable] (mathematics数学) a quantity that does not have a known value未知数；未知量
    • X and Y in the equation are both unknowns.等式中的 X 和 Y 都是未知数。

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