unknown

名词 unknown:

1. an unknown and unexplored region
   同义词：unknown region, terra incognita
2. anyone who does not belong in the environment in which they are found
   同义词：stranger, alien
3. a variable whose values are solutions of an equation
   同义词：unknown quantity

形容词 unknown:

1. not known
2. being or having an unknown or unnamed source
   同义词：nameless, unidentified, unnamed
3. not known to exist- Edith Wharton
4. not famous or acclaimed
   同义词：obscure, unsung
5. not known before
   同义词：strange

1. The new sales director is still a bit of an unknown quantity.
   新来的销售部主任大家还不大了解。
2. He was an unknown painter one year ago.
   一年前，他还是一个不为人知的画家。
3. The director cast her in a leading part when she was a young unknown of 16.
   当她还是一个十六岁的无名少女时，导演选中她演主角。