unknown
🇺🇸
/ˌʌnˈnəʊn/
🇬🇧
/ˌʌnˈnəʊn/
not known or recognized
The source of the sound remains unknown.
声音的来源仍然未知。
not famous or familiar
He was an unknown artist before his first exhibition.
在他的首次展览之前,他是一位不知名的艺术家。
not happening or existing before
It is not unknown for students to feel nervous before exams.
学生在考试前感到紧张并不罕见。
places or things not known about
Exploring the unknown can be both exciting and scary.
探索未知既令人兴奋又令人害怕。
a person who is not famous
The director chose an unknown for the lead role.
导演选择了一位无名小卒来担任主角。
a fact or influence not known
There are many unknowns in this situation.
在这种情况下存在许多未知因素。
a value that is not known
In math, we often solve for the unknown.
在数学中,我们经常求解未知数。