unknown
adjective uk/ʌnˈnəʊn/ us/ʌnˈnoʊn/
B1 未知的；不知名的；不了解的；不熟悉的
not known or familiar
The exact number of people carrying the virus is unknown. 病毒携带者的准确数目还不清楚。
As recently as six months ago her name was almost unknown in this country. 就在6个月前，她的名字在这个国家还几乎无人知晓。
Unknown to me, she'd organized a party for my birthday. 她为我组织了生日派对，我却还蒙在鼓里。
- More examples
- An unknown terrorist group has claimed responsibility for this morning's bomb attack.
- A generation ago, home computers were virtually unknown.
- The article is of unknown authorship .
- The director took a calculated risk in giving the film's main role to an unknown actor.
- The very concept of free speech is unknown to them.
unknown
noun uk/ʌnˈnəʊn/ us/ʌnˈnoʊn/
C1 [ S ]陌生事物；未知事物
what is not familiar or known
Racism is in some ways just a fear of the unknown. 在某些意义上，种族主义只是一种对未知事物的恐惧罢了。
[ C ]无名小卒，无名之辈（尤指不知名的演员或运动员）
a person, especially a performer or sports player, who is not famous
For her latest film she deliberately chose a cast of unknowns. 在新拍影片中，她特意挑了一批不知名的演员。
[ C ] mainly US不明情况；未知因素
something that cannot be guessed at or calculated because so little is known about it
It's the big unknowns that make insurance companies uneasy. 令保险公司担心的是无法预测的重大事件。